/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerCTransformed.xml -s ../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf -i ../../../trunk/examples/svcomp/nla-digbench-scaling/hard-ll_unwindbound20.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-6253b08 [2021-05-06 08:49:37,402 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-06 08:49:37,405 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-06 08:49:37,445 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-06 08:49:37,466 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-06 08:49:37,467 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-06 08:49:37,469 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-06 08:49:37,470 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-06 08:49:37,472 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-06 08:49:37,473 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-06 08:49:37,475 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-06 08:49:37,480 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-06 08:49:37,481 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-06 08:49:37,483 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-06 08:49:37,483 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-06 08:49:37,489 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-06 08:49:37,496 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-06 08:49:37,505 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-06 08:49:37,506 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-06 08:49:37,507 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-06 08:49:37,507 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2021-05-06 08:49:37,536 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-06 08:49:37,536 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-06 08:49:37,539 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-06 08:49:37,539 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-06 08:49:37,539 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-06 08:49:37,539 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-06 08:49:37,540 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-06 08:49:37,540 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-06 08:49:37,540 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-06 08:49:37,540 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-06 08:49:37,541 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-06 08:49:37,541 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-06 08:49:37,541 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-06 08:49:37,541 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-06 08:49:37,542 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-06 08:49:37,542 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-06 08:49:37,542 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-06 08:49:37,542 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-06 08:49:37,542 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 08:49:37,543 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-06 08:49:37,543 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-06 08:49:37,544 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-05-06 08:49:37,544 INFO L138 SettingsManager]: * TransformationType=LOOP_ACCELERATION_JORDAN WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-06 08:49:37,898 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-06 08:49:37,915 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-06 08:49:37,917 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-06 08:49:37,918 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-06 08:49:37,919 INFO L275 PluginConnector]: CDTParser initialized [2021-05-06 08:49:37,920 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/hard-ll_unwindbound20.c [2021-05-06 08:49:37,985 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8560c08f7/49db52c1dfab4567b7205da91a97b0a4/FLAGf1c324f9e [2021-05-06 08:49:38,345 INFO L306 CDTParser]: Found 1 translation units. [2021-05-06 08:49:38,345 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/hard-ll_unwindbound20.c [2021-05-06 08:49:38,351 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8560c08f7/49db52c1dfab4567b7205da91a97b0a4/FLAGf1c324f9e [2021-05-06 08:49:38,363 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8560c08f7/49db52c1dfab4567b7205da91a97b0a4 [2021-05-06 08:49:38,368 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-06 08:49:38,370 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-05-06 08:49:38,373 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-06 08:49:38,373 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-06 08:49:38,376 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-06 08:49:38,377 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 08:49:38" (1/1) ... [2021-05-06 08:49:38,378 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@ef12b6f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:49:38, skipping insertion in model container [2021-05-06 08:49:38,378 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 08:49:38" (1/1) ... [2021-05-06 08:49:38,384 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-06 08:49:38,396 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-06 08:49:38,494 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/hard-ll_unwindbound20.c[546,559] [2021-05-06 08:49:38,508 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 08:49:38,515 INFO L203 MainTranslator]: Completed pre-run [2021-05-06 08:49:38,525 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/hard-ll_unwindbound20.c[546,559] [2021-05-06 08:49:38,532 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 08:49:38,543 INFO L208 MainTranslator]: Completed translation [2021-05-06 08:49:38,544 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:49:38 WrapperNode [2021-05-06 08:49:38,544 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-06 08:49:38,545 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-06 08:49:38,545 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-06 08:49:38,545 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-06 08:49:38,555 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:49:38" (1/1) ... [2021-05-06 08:49:38,555 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:49:38" (1/1) ... [2021-05-06 08:49:38,561 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:49:38" (1/1) ... [2021-05-06 08:49:38,561 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:49:38" (1/1) ... [2021-05-06 08:49:38,566 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:49:38" (1/1) ... [2021-05-06 08:49:38,570 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:49:38" (1/1) ... [2021-05-06 08:49:38,571 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:49:38" (1/1) ... [2021-05-06 08:49:38,573 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-06 08:49:38,574 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-06 08:49:38,574 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-06 08:49:38,574 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-06 08:49:38,575 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:49:38" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 08:49:38,698 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-06 08:49:38,698 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-06 08:49:38,698 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-06 08:49:38,699 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-06 08:49:38,699 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-06 08:49:38,699 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-06 08:49:38,699 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-06 08:49:38,699 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-06 08:49:38,700 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-06 08:49:38,700 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-06 08:49:38,700 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_unsigned_int [2021-05-06 08:49:38,700 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-06 08:49:38,701 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-06 08:49:38,701 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-06 08:49:38,701 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-06 08:49:38,702 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-06 08:49:38,702 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-06 08:49:38,702 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-06 08:49:38,702 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-06 08:49:38,703 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-06 08:49:39,043 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-06 08:49:39,044 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-05-06 08:49:39,045 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 08:49:39 BoogieIcfgContainer [2021-05-06 08:49:39,045 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-06 08:49:39,046 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2021-05-06 08:49:39,046 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2021-05-06 08:49:39,046 INFO L275 PluginConnector]: IcfgTransformer initialized [2021-05-06 08:49:39,056 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 08:49:39" (1/1) ... [2021-05-06 08:49:39,075 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.05 08:49:39 BasicIcfg [2021-05-06 08:49:39,075 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2021-05-06 08:49:39,078 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-06 08:49:39,078 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-06 08:49:39,080 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-06 08:49:39,080 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.05 08:49:38" (1/4) ... [2021-05-06 08:49:39,081 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@9d18e78 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 08:49:39, skipping insertion in model container [2021-05-06 08:49:39,081 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:49:38" (2/4) ... [2021-05-06 08:49:39,082 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@9d18e78 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 08:49:39, skipping insertion in model container [2021-05-06 08:49:39,082 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 08:49:39" (3/4) ... [2021-05-06 08:49:39,084 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@9d18e78 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.05 08:49:39, skipping insertion in model container [2021-05-06 08:49:39,084 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.05 08:49:39" (4/4) ... [2021-05-06 08:49:39,085 INFO L111 eAbstractionObserver]: Analyzing ICFG hard-ll_unwindbound20.cJordan [2021-05-06 08:49:39,090 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2021-05-06 08:49:39,094 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-06 08:49:39,109 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-06 08:49:39,124 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-06 08:49:39,124 INFO L377 AbstractCegarLoop]: Hoare is false [2021-05-06 08:49:39,124 INFO L378 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2021-05-06 08:49:39,124 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-06 08:49:39,124 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-06 08:49:39,124 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-06 08:49:39,124 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-06 08:49:39,124 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-06 08:49:39,138 INFO L276 IsEmpty]: Start isEmpty. Operand has 37 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 22 states have internal predecessors, (31), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-05-06 08:49:39,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-06 08:49:39,146 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:49:39,147 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:49:39,147 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:49:39,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:49:39,159 INFO L82 PathProgramCache]: Analyzing trace with hash 79654685, now seen corresponding path program 1 times [2021-05-06 08:49:39,167 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:49:39,167 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1175163661] [2021-05-06 08:49:39,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:49:39,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:49:39,358 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 08:49:39,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:49:39,392 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-06 08:49:39,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:49:39,409 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 08:49:39,410 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:49:39,411 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1175163661] [2021-05-06 08:49:39,411 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1175163661] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 08:49:39,411 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 08:49:39,411 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-06 08:49:39,412 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1290470499] [2021-05-06 08:49:39,416 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-06 08:49:39,416 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:49:39,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-06 08:49:39,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 08:49:39,427 INFO L87 Difference]: Start difference. First operand has 37 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 22 states have internal predecessors, (31), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-06 08:49:39,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:49:39,537 INFO L93 Difference]: Finished difference Result 38 states and 48 transitions. [2021-05-06 08:49:39,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-06 08:49:39,539 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 18 [2021-05-06 08:49:39,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:49:39,546 INFO L225 Difference]: With dead ends: 38 [2021-05-06 08:49:39,546 INFO L226 Difference]: Without dead ends: 33 [2021-05-06 08:49:39,548 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 72.5ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 08:49:39,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-05-06 08:49:39,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 32. [2021-05-06 08:49:39,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 19 states have internal predecessors, (24), 10 states have call successors, (10), 4 states have call predecessors, (10), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-06 08:49:39,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 42 transitions. [2021-05-06 08:49:39,580 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 42 transitions. Word has length 18 [2021-05-06 08:49:39,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:49:39,581 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 42 transitions. [2021-05-06 08:49:39,581 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-06 08:49:39,581 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 42 transitions. [2021-05-06 08:49:39,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-06 08:49:39,582 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:49:39,582 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:49:39,582 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-06 08:49:39,582 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:49:39,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:49:39,583 INFO L82 PathProgramCache]: Analyzing trace with hash -85369733, now seen corresponding path program 1 times [2021-05-06 08:49:39,583 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:49:39,584 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [905894686] [2021-05-06 08:49:39,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:49:39,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:49:39,767 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 08:49:39,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:49:39,792 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-06 08:49:39,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:49:39,801 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 08:49:39,802 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:49:39,802 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [905894686] [2021-05-06 08:49:39,803 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [905894686] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 08:49:39,803 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 08:49:39,803 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-06 08:49:39,804 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [857642397] [2021-05-06 08:49:39,805 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 08:49:39,805 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:49:39,806 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 08:49:39,807 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-06 08:49:39,808 INFO L87 Difference]: Start difference. First operand 32 states and 42 transitions. Second operand has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-06 08:49:40,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:49:40,204 INFO L93 Difference]: Finished difference Result 45 states and 60 transitions. [2021-05-06 08:49:40,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 08:49:40,205 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 18 [2021-05-06 08:49:40,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:49:40,208 INFO L225 Difference]: With dead ends: 45 [2021-05-06 08:49:40,208 INFO L226 Difference]: Without dead ends: 45 [2021-05-06 08:49:40,209 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 214.4ms TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-05-06 08:49:40,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-05-06 08:49:40,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 36. [2021-05-06 08:49:40,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 21 states have (on average 1.2857142857142858) internal successors, (27), 22 states have internal predecessors, (27), 10 states have call successors, (10), 5 states have call predecessors, (10), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-06 08:49:40,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 45 transitions. [2021-05-06 08:49:40,232 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 45 transitions. Word has length 18 [2021-05-06 08:49:40,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:49:40,232 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 45 transitions. [2021-05-06 08:49:40,232 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-06 08:49:40,232 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 45 transitions. [2021-05-06 08:49:40,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-06 08:49:40,234 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:49:40,234 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:49:40,237 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-06 08:49:40,237 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:49:40,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:49:40,239 INFO L82 PathProgramCache]: Analyzing trace with hash -1527809342, now seen corresponding path program 1 times [2021-05-06 08:49:40,239 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:49:40,240 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [719527901] [2021-05-06 08:49:40,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:49:40,255 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:49:40,256 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1236926892] [2021-05-06 08:49:40,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:49:40,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:49:40,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-06 08:49:40,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:49:40,359 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:49:40,364 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:49:40,366 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:49:40,394 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:49:40,398 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:49:40,416 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 08:49:40,417 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:49:40,417 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [719527901] [2021-05-06 08:49:40,417 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:49:40,417 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1236926892] [2021-05-06 08:49:40,417 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1236926892] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 08:49:40,417 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 08:49:40,417 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-06 08:49:40,417 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034711989] [2021-05-06 08:49:40,418 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-06 08:49:40,418 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:49:40,418 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-06 08:49:40,419 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-06 08:49:40,419 INFO L87 Difference]: Start difference. First operand 36 states and 45 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-06 08:49:40,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:49:40,429 INFO L93 Difference]: Finished difference Result 38 states and 47 transitions. [2021-05-06 08:49:40,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-06 08:49:40,430 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 20 [2021-05-06 08:49:40,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:49:40,431 INFO L225 Difference]: With dead ends: 38 [2021-05-06 08:49:40,431 INFO L226 Difference]: Without dead ends: 38 [2021-05-06 08:49:40,431 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.2ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-06 08:49:40,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-05-06 08:49:40,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2021-05-06 08:49:40,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 24 states have internal predecessors, (29), 10 states have call successors, (10), 5 states have call predecessors, (10), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-06 08:49:40,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 47 transitions. [2021-05-06 08:49:40,436 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 47 transitions. Word has length 20 [2021-05-06 08:49:40,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:49:40,436 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 47 transitions. [2021-05-06 08:49:40,436 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-06 08:49:40,436 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 47 transitions. [2021-05-06 08:49:40,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-06 08:49:40,437 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:49:40,437 INFO L523 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:49:40,637 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-05-06 08:49:40,638 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:49:40,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:49:40,639 INFO L82 PathProgramCache]: Analyzing trace with hash 2128444854, now seen corresponding path program 1 times [2021-05-06 08:49:40,639 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:49:40,639 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [961463303] [2021-05-06 08:49:40,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:49:40,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:49:40,727 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 08:49:40,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:49:40,734 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-06 08:49:40,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:49:40,739 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-05-06 08:49:40,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:49:40,745 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 08:49:40,745 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:49:40,746 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [961463303] [2021-05-06 08:49:40,746 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [961463303] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 08:49:40,746 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 08:49:40,746 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-06 08:49:40,746 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [876348742] [2021-05-06 08:49:40,746 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 08:49:40,747 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:49:40,747 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 08:49:40,747 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-06 08:49:40,747 INFO L87 Difference]: Start difference. First operand 38 states and 47 transitions. Second operand has 6 states, 6 states have (on average 2.5) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 08:49:41,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:49:41,052 INFO L93 Difference]: Finished difference Result 50 states and 64 transitions. [2021-05-06 08:49:41,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 08:49:41,052 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 23 [2021-05-06 08:49:41,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:49:41,055 INFO L225 Difference]: With dead ends: 50 [2021-05-06 08:49:41,056 INFO L226 Difference]: Without dead ends: 50 [2021-05-06 08:49:41,056 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 184.3ms TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-05-06 08:49:41,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-05-06 08:49:41,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 42. [2021-05-06 08:49:41,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 26 states have (on average 1.2307692307692308) internal successors, (32), 27 states have internal predecessors, (32), 10 states have call successors, (10), 6 states have call predecessors, (10), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-06 08:49:41,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 50 transitions. [2021-05-06 08:49:41,067 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 50 transitions. Word has length 23 [2021-05-06 08:49:41,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:49:41,068 INFO L480 AbstractCegarLoop]: Abstraction has 42 states and 50 transitions. [2021-05-06 08:49:41,068 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 08:49:41,068 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 50 transitions. [2021-05-06 08:49:41,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-06 08:49:41,069 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:49:41,069 INFO L523 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:49:41,069 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-05-06 08:49:41,070 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:49:41,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:49:41,070 INFO L82 PathProgramCache]: Analyzing trace with hash 135546551, now seen corresponding path program 1 times [2021-05-06 08:49:41,070 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:49:41,070 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1108588996] [2021-05-06 08:49:41,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:49:41,095 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:49:41,095 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1217928403] [2021-05-06 08:49:41,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:49:41,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:49:41,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-06 08:49:41,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:49:41,253 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:49:41,262 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 08:49:41,263 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:49:41,263 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1108588996] [2021-05-06 08:49:41,263 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:49:41,263 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1217928403] [2021-05-06 08:49:41,263 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1217928403] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 08:49:41,263 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 08:49:41,263 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 08:49:41,263 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1260785239] [2021-05-06 08:49:41,264 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 08:49:41,264 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:49:41,264 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 08:49:41,264 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-06 08:49:41,265 INFO L87 Difference]: Start difference. First operand 42 states and 50 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-06 08:49:41,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:49:41,331 INFO L93 Difference]: Finished difference Result 57 states and 72 transitions. [2021-05-06 08:49:41,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-06 08:49:41,332 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 28 [2021-05-06 08:49:41,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:49:41,333 INFO L225 Difference]: With dead ends: 57 [2021-05-06 08:49:41,333 INFO L226 Difference]: Without dead ends: 56 [2021-05-06 08:49:41,333 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 21.6ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-06 08:49:41,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-05-06 08:49:41,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2021-05-06 08:49:41,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 33 states have (on average 1.2424242424242424) internal successors, (41), 35 states have internal predecessors, (41), 16 states have call successors, (16), 7 states have call predecessors, (16), 6 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2021-05-06 08:49:41,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 70 transitions. [2021-05-06 08:49:41,345 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 70 transitions. Word has length 28 [2021-05-06 08:49:41,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:49:41,346 INFO L480 AbstractCegarLoop]: Abstraction has 56 states and 70 transitions. [2021-05-06 08:49:41,346 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-06 08:49:41,346 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 70 transitions. [2021-05-06 08:49:41,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-06 08:49:41,347 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:49:41,347 INFO L523 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:49:41,567 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:49:41,568 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:49:41,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:49:41,568 INFO L82 PathProgramCache]: Analyzing trace with hash 1016025214, now seen corresponding path program 1 times [2021-05-06 08:49:41,568 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:49:41,568 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [557700461] [2021-05-06 08:49:41,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:49:41,575 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:49:41,575 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1958254548] [2021-05-06 08:49:41,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:49:41,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:49:41,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-06 08:49:41,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:49:41,684 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:49:41,690 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:49:41,693 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:49:41,727 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:49:41,731 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:49:41,734 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:49:41,790 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:49:41,792 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:49:41,805 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-06 08:49:41,805 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:49:41,805 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [557700461] [2021-05-06 08:49:41,805 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:49:41,805 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1958254548] [2021-05-06 08:49:41,805 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1958254548] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 08:49:41,805 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 08:49:41,805 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 08:49:41,806 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831146110] [2021-05-06 08:49:41,807 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 08:49:41,807 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:49:41,807 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 08:49:41,807 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-06 08:49:41,808 INFO L87 Difference]: Start difference. First operand 56 states and 70 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 4 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2021-05-06 08:49:41,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:49:41,842 INFO L93 Difference]: Finished difference Result 69 states and 79 transitions. [2021-05-06 08:49:41,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-06 08:49:41,842 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 4 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) Word has length 36 [2021-05-06 08:49:41,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:49:41,845 INFO L225 Difference]: With dead ends: 69 [2021-05-06 08:49:41,845 INFO L226 Difference]: Without dead ends: 69 [2021-05-06 08:49:41,845 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 9.1ms TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-06 08:49:41,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2021-05-06 08:49:41,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 68. [2021-05-06 08:49:41,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 42 states have (on average 1.1666666666666667) internal successors, (49), 44 states have internal predecessors, (49), 16 states have call successors, (16), 10 states have call predecessors, (16), 9 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2021-05-06 08:49:41,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 78 transitions. [2021-05-06 08:49:41,863 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 78 transitions. Word has length 36 [2021-05-06 08:49:41,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:49:41,864 INFO L480 AbstractCegarLoop]: Abstraction has 68 states and 78 transitions. [2021-05-06 08:49:41,864 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 4 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2021-05-06 08:49:41,864 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 78 transitions. [2021-05-06 08:49:41,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-06 08:49:41,865 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:49:41,865 INFO L523 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:49:42,084 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:49:42,085 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:49:42,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:49:42,086 INFO L82 PathProgramCache]: Analyzing trace with hash 1017127481, now seen corresponding path program 1 times [2021-05-06 08:49:42,086 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:49:42,086 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [837589288] [2021-05-06 08:49:42,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:49:42,093 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:49:42,094 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1233915835] [2021-05-06 08:49:42,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:49:42,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:49:42,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-06 08:49:42,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:49:42,225 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:49:42,231 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:49:42,254 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:49:42,263 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:49:42,279 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:49:42,281 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:49:42,297 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:49:42,324 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:49:42,328 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:49:42,355 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:49:42,364 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-06 08:49:42,364 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:49:42,365 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [837589288] [2021-05-06 08:49:42,365 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:49:42,365 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1233915835] [2021-05-06 08:49:42,365 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1233915835] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 08:49:42,365 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 08:49:42,365 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-06 08:49:42,365 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999367237] [2021-05-06 08:49:42,365 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 08:49:42,365 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:49:42,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 08:49:42,366 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-06 08:49:42,366 INFO L87 Difference]: Start difference. First operand 68 states and 78 transitions. Second operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-06 08:49:42,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:49:42,465 INFO L93 Difference]: Finished difference Result 72 states and 81 transitions. [2021-05-06 08:49:42,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 08:49:42,465 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 36 [2021-05-06 08:49:42,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:49:42,469 INFO L225 Difference]: With dead ends: 72 [2021-05-06 08:49:42,469 INFO L226 Difference]: Without dead ends: 58 [2021-05-06 08:49:42,469 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 57.1ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-05-06 08:49:42,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-05-06 08:49:42,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2021-05-06 08:49:42,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 36 states have (on average 1.1666666666666667) internal successors, (42), 37 states have internal predecessors, (42), 13 states have call successors, (13), 9 states have call predecessors, (13), 8 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2021-05-06 08:49:42,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 66 transitions. [2021-05-06 08:49:42,473 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 66 transitions. Word has length 36 [2021-05-06 08:49:42,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:49:42,473 INFO L480 AbstractCegarLoop]: Abstraction has 58 states and 66 transitions. [2021-05-06 08:49:42,474 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-06 08:49:42,474 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 66 transitions. [2021-05-06 08:49:42,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-05-06 08:49:42,475 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:49:42,475 INFO L523 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:49:42,688 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:49:42,689 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:49:42,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:49:42,689 INFO L82 PathProgramCache]: Analyzing trace with hash 1880362404, now seen corresponding path program 1 times [2021-05-06 08:49:42,690 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:49:42,690 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1648466548] [2021-05-06 08:49:42,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:49:42,697 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:49:42,697 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [666076855] [2021-05-06 08:49:42,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:49:42,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:49:42,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-06 08:49:42,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:49:42,767 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:49:42,769 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:49:42,770 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:49:42,784 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:49:42,786 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:49:42,786 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:49:42,817 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:49:42,818 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:49:42,831 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-06 08:49:42,832 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:49:42,832 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1648466548] [2021-05-06 08:49:42,832 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:49:42,832 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [666076855] [2021-05-06 08:49:42,832 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [666076855] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:49:42,832 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:49:42,832 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-05-06 08:49:42,832 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1814782561] [2021-05-06 08:49:42,833 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 08:49:42,833 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:49:42,833 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 08:49:42,833 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-06 08:49:42,833 INFO L87 Difference]: Start difference. First operand 58 states and 66 transitions. Second operand has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 4 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2021-05-06 08:49:42,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:49:42,865 INFO L93 Difference]: Finished difference Result 60 states and 68 transitions. [2021-05-06 08:49:42,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 08:49:42,866 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 4 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) Word has length 38 [2021-05-06 08:49:42,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:49:42,866 INFO L225 Difference]: With dead ends: 60 [2021-05-06 08:49:42,867 INFO L226 Difference]: Without dead ends: 60 [2021-05-06 08:49:42,867 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 13.6ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-06 08:49:42,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-05-06 08:49:42,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2021-05-06 08:49:42,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 38 states have (on average 1.1578947368421053) internal successors, (44), 39 states have internal predecessors, (44), 13 states have call successors, (13), 9 states have call predecessors, (13), 8 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2021-05-06 08:49:42,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 68 transitions. [2021-05-06 08:49:42,871 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 68 transitions. Word has length 38 [2021-05-06 08:49:42,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:49:42,871 INFO L480 AbstractCegarLoop]: Abstraction has 60 states and 68 transitions. [2021-05-06 08:49:42,871 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 4 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2021-05-06 08:49:42,871 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 68 transitions. [2021-05-06 08:49:42,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-05-06 08:49:42,872 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:49:42,872 INFO L523 BasicCegarLoop]: trace histogram [6, 5, 5, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:49:43,096 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:49:43,097 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:49:43,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:49:43,097 INFO L82 PathProgramCache]: Analyzing trace with hash 1525733273, now seen corresponding path program 1 times [2021-05-06 08:49:43,097 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:49:43,098 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1538669541] [2021-05-06 08:49:43,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:49:43,105 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:49:43,105 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1758741737] [2021-05-06 08:49:43,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:49:43,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:49:43,204 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 16 conjunts are in the unsatisfiable core [2021-05-06 08:49:43,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:49:43,263 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:49:43,265 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:49:43,276 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:49:43,280 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:49:43,291 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:49:43,293 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:49:43,338 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:49:43,340 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:49:43,354 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:49:43,356 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:49:43,372 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:49:43,374 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:49:43,384 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:49:43,399 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 5 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-05-06 08:49:43,399 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:49:43,400 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1538669541] [2021-05-06 08:49:43,400 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:49:43,400 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1758741737] [2021-05-06 08:49:43,401 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1758741737] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:49:43,401 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:49:43,401 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-06 08:49:43,401 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618602676] [2021-05-06 08:49:43,402 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-06 08:49:43,402 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:49:43,403 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-06 08:49:43,403 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-05-06 08:49:43,403 INFO L87 Difference]: Start difference. First operand 60 states and 68 transitions. Second operand has 9 states, 9 states have (on average 2.0) internal successors, (18), 7 states have internal predecessors, (18), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-06 08:49:43,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:49:43,582 INFO L93 Difference]: Finished difference Result 83 states and 103 transitions. [2021-05-06 08:49:43,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-06 08:49:43,583 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 7 states have internal predecessors, (18), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) Word has length 46 [2021-05-06 08:49:43,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:49:43,586 INFO L225 Difference]: With dead ends: 83 [2021-05-06 08:49:43,586 INFO L226 Difference]: Without dead ends: 82 [2021-05-06 08:49:43,587 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 59.4ms TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-05-06 08:49:43,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2021-05-06 08:49:43,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 80. [2021-05-06 08:49:43,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 49 states have (on average 1.2040816326530612) internal successors, (59), 51 states have internal predecessors, (59), 21 states have call successors, (21), 10 states have call predecessors, (21), 9 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2021-05-06 08:49:43,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 98 transitions. [2021-05-06 08:49:43,595 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 98 transitions. Word has length 46 [2021-05-06 08:49:43,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:49:43,595 INFO L480 AbstractCegarLoop]: Abstraction has 80 states and 98 transitions. [2021-05-06 08:49:43,596 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 7 states have internal predecessors, (18), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-06 08:49:43,596 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 98 transitions. [2021-05-06 08:49:43,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-05-06 08:49:43,603 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:49:43,604 INFO L523 BasicCegarLoop]: trace histogram [7, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:49:43,816 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:49:43,817 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:49:43,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:49:43,818 INFO L82 PathProgramCache]: Analyzing trace with hash 1447419744, now seen corresponding path program 1 times [2021-05-06 08:49:43,818 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:49:43,818 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1173046594] [2021-05-06 08:49:43,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:49:43,825 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:49:43,825 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1458538169] [2021-05-06 08:49:43,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:49:43,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:49:43,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-06 08:49:43,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:49:43,910 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:49:43,912 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:49:43,913 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:49:43,928 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:49:43,930 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:49:43,931 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:49:43,967 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:49:43,969 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:49:43,969 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:49:44,003 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:49:44,004 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:49:44,016 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 12 proven. 42 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-05-06 08:49:44,017 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:49:44,017 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1173046594] [2021-05-06 08:49:44,017 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:49:44,017 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1458538169] [2021-05-06 08:49:44,017 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1458538169] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:49:44,017 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:49:44,017 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-06 08:49:44,017 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363626925] [2021-05-06 08:49:44,017 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 08:49:44,018 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:49:44,018 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 08:49:44,019 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-06 08:49:44,019 INFO L87 Difference]: Start difference. First operand 80 states and 98 transitions. Second operand has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 5 states have call successors, (10), 5 states have call predecessors, (10), 3 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) [2021-05-06 08:49:44,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:49:44,061 INFO L93 Difference]: Finished difference Result 93 states and 107 transitions. [2021-05-06 08:49:44,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 08:49:44,062 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 5 states have call successors, (10), 5 states have call predecessors, (10), 3 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) Word has length 54 [2021-05-06 08:49:44,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:49:44,065 INFO L225 Difference]: With dead ends: 93 [2021-05-06 08:49:44,065 INFO L226 Difference]: Without dead ends: 93 [2021-05-06 08:49:44,066 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 12.6ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-06 08:49:44,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2021-05-06 08:49:44,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 92. [2021-05-06 08:49:44,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 58 states have (on average 1.1551724137931034) internal successors, (67), 60 states have internal predecessors, (67), 21 states have call successors, (21), 13 states have call predecessors, (21), 12 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2021-05-06 08:49:44,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 106 transitions. [2021-05-06 08:49:44,071 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 106 transitions. Word has length 54 [2021-05-06 08:49:44,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:49:44,071 INFO L480 AbstractCegarLoop]: Abstraction has 92 states and 106 transitions. [2021-05-06 08:49:44,072 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 5 states have call successors, (10), 5 states have call predecessors, (10), 3 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) [2021-05-06 08:49:44,072 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 106 transitions. [2021-05-06 08:49:44,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-05-06 08:49:44,072 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:49:44,073 INFO L523 BasicCegarLoop]: trace histogram [7, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:49:44,288 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-05-06 08:49:44,289 INFO L428 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:49:44,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:49:44,290 INFO L82 PathProgramCache]: Analyzing trace with hash 1448522011, now seen corresponding path program 1 times [2021-05-06 08:49:44,290 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:49:44,290 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [931889096] [2021-05-06 08:49:44,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:49:44,296 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:49:44,296 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [798310280] [2021-05-06 08:49:44,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:49:44,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:49:44,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-06 08:49:44,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:49:44,420 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:49:44,422 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:49:44,435 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:49:44,437 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:49:44,448 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:49:44,451 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:49:44,466 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:49:44,469 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:49:44,510 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:49:44,515 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:49:44,538 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:49:44,542 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:49:44,564 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:49:44,568 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:49:44,585 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:49:44,634 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:49:44,641 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:49:44,659 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:49:44,671 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-05-06 08:49:44,671 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:49:44,672 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [931889096] [2021-05-06 08:49:44,672 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:49:44,672 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [798310280] [2021-05-06 08:49:44,672 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [798310280] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:49:44,672 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:49:44,672 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-06 08:49:44,672 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1767282224] [2021-05-06 08:49:44,672 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-06 08:49:44,672 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:49:44,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-06 08:49:44,673 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-05-06 08:49:44,673 INFO L87 Difference]: Start difference. First operand 92 states and 106 transitions. Second operand has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 4 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-05-06 08:49:44,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:49:44,857 INFO L93 Difference]: Finished difference Result 102 states and 118 transitions. [2021-05-06 08:49:44,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 08:49:44,857 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 4 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 54 [2021-05-06 08:49:44,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:49:44,858 INFO L225 Difference]: With dead ends: 102 [2021-05-06 08:49:44,858 INFO L226 Difference]: Without dead ends: 96 [2021-05-06 08:49:44,859 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 107.3ms TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-05-06 08:49:44,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-05-06 08:49:44,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 96. [2021-05-06 08:49:44,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 61 states have (on average 1.1311475409836065) internal successors, (69), 63 states have internal predecessors, (69), 21 states have call successors, (21), 14 states have call predecessors, (21), 13 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2021-05-06 08:49:44,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 108 transitions. [2021-05-06 08:49:44,863 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 108 transitions. Word has length 54 [2021-05-06 08:49:44,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:49:44,863 INFO L480 AbstractCegarLoop]: Abstraction has 96 states and 108 transitions. [2021-05-06 08:49:44,863 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 4 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-05-06 08:49:44,863 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 108 transitions. [2021-05-06 08:49:44,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-05-06 08:49:44,864 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:49:44,864 INFO L523 BasicCegarLoop]: trace histogram [7, 6, 6, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:49:45,085 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-05-06 08:49:45,085 INFO L428 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:49:45,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:49:45,085 INFO L82 PathProgramCache]: Analyzing trace with hash -161321978, now seen corresponding path program 2 times [2021-05-06 08:49:45,085 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:49:45,086 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [625907686] [2021-05-06 08:49:45,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:49:45,093 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:49:45,093 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [481787219] [2021-05-06 08:49:45,093 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:49:45,141 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-05-06 08:49:45,141 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:49:45,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-06 08:49:45,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:49:45,242 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:49:45,250 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-05-06 08:49:45,251 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:49:45,251 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [625907686] [2021-05-06 08:49:45,251 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:49:45,251 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [481787219] [2021-05-06 08:49:45,251 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [481787219] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 08:49:45,251 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 08:49:45,251 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 08:49:45,251 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118607350] [2021-05-06 08:49:45,251 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 08:49:45,252 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:49:45,252 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 08:49:45,252 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-06 08:49:45,252 INFO L87 Difference]: Start difference. First operand 96 states and 108 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-06 08:49:45,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:49:45,303 INFO L93 Difference]: Finished difference Result 108 states and 125 transitions. [2021-05-06 08:49:45,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-06 08:49:45,305 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 56 [2021-05-06 08:49:45,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:49:45,306 INFO L225 Difference]: With dead ends: 108 [2021-05-06 08:49:45,306 INFO L226 Difference]: Without dead ends: 108 [2021-05-06 08:49:45,306 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 19.8ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-06 08:49:45,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2021-05-06 08:49:45,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 107. [2021-05-06 08:49:45,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 68 states have (on average 1.161764705882353) internal successors, (79), 71 states have internal predecessors, (79), 24 states have call successors, (24), 15 states have call predecessors, (24), 14 states have return successors, (21), 20 states have call predecessors, (21), 21 states have call successors, (21) [2021-05-06 08:49:45,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 124 transitions. [2021-05-06 08:49:45,313 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 124 transitions. Word has length 56 [2021-05-06 08:49:45,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:49:45,313 INFO L480 AbstractCegarLoop]: Abstraction has 107 states and 124 transitions. [2021-05-06 08:49:45,313 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-06 08:49:45,313 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 124 transitions. [2021-05-06 08:49:45,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-05-06 08:49:45,314 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:49:45,314 INFO L523 BasicCegarLoop]: trace histogram [8, 7, 7, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:49:45,528 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:49:45,529 INFO L428 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:49:45,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:49:45,529 INFO L82 PathProgramCache]: Analyzing trace with hash 1294763379, now seen corresponding path program 1 times [2021-05-06 08:49:45,529 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:49:45,529 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [760476425] [2021-05-06 08:49:45,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:49:45,536 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:49:45,536 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1288303520] [2021-05-06 08:49:45,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:49:45,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:49:45,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-06 08:49:45,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:49:45,618 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:49:45,620 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:49:45,620 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:49:45,633 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:49:45,635 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:49:45,636 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:49:45,671 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:49:45,672 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:49:45,673 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:49:45,703 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:49:45,705 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:49:45,727 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 36 proven. 46 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-05-06 08:49:45,728 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:49:45,728 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [760476425] [2021-05-06 08:49:45,728 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:49:45,728 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1288303520] [2021-05-06 08:49:45,728 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1288303520] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:49:45,728 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:49:45,728 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-06 08:49:45,728 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1907918227] [2021-05-06 08:49:45,729 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 08:49:45,729 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:49:45,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 08:49:45,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-06 08:49:45,730 INFO L87 Difference]: Start difference. First operand 107 states and 124 transitions. Second operand has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 5 states have internal predecessors, (28), 5 states have call successors, (11), 5 states have call predecessors, (11), 4 states have return successors, (9), 4 states have call predecessors, (9), 5 states have call successors, (9) [2021-05-06 08:49:45,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:49:45,782 INFO L93 Difference]: Finished difference Result 109 states and 126 transitions. [2021-05-06 08:49:45,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 08:49:45,782 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 5 states have internal predecessors, (28), 5 states have call successors, (11), 5 states have call predecessors, (11), 4 states have return successors, (9), 4 states have call predecessors, (9), 5 states have call successors, (9) Word has length 61 [2021-05-06 08:49:45,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:49:45,785 INFO L225 Difference]: With dead ends: 109 [2021-05-06 08:49:45,785 INFO L226 Difference]: Without dead ends: 109 [2021-05-06 08:49:45,785 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 27.2ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-05-06 08:49:45,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2021-05-06 08:49:45,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 109. [2021-05-06 08:49:45,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 70 states have (on average 1.1571428571428573) internal successors, (81), 73 states have internal predecessors, (81), 24 states have call successors, (24), 15 states have call predecessors, (24), 14 states have return successors, (21), 20 states have call predecessors, (21), 21 states have call successors, (21) [2021-05-06 08:49:45,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 126 transitions. [2021-05-06 08:49:45,790 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 126 transitions. Word has length 61 [2021-05-06 08:49:45,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:49:45,790 INFO L480 AbstractCegarLoop]: Abstraction has 109 states and 126 transitions. [2021-05-06 08:49:45,790 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 5 states have internal predecessors, (28), 5 states have call successors, (11), 5 states have call predecessors, (11), 4 states have return successors, (9), 4 states have call predecessors, (9), 5 states have call successors, (9) [2021-05-06 08:49:45,790 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 126 transitions. [2021-05-06 08:49:45,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-05-06 08:49:45,791 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:49:45,791 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:49:46,014 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:49:46,015 INFO L428 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:49:46,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:49:46,015 INFO L82 PathProgramCache]: Analyzing trace with hash -1774996485, now seen corresponding path program 2 times [2021-05-06 08:49:46,015 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:49:46,015 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [543331957] [2021-05-06 08:49:46,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:49:46,022 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:49:46,023 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [702020697] [2021-05-06 08:49:46,023 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:49:46,127 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 08:49:46,127 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:49:46,128 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-06 08:49:46,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:49:46,268 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:49:46,278 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 16 proven. 16 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2021-05-06 08:49:46,279 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:49:46,279 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [543331957] [2021-05-06 08:49:46,279 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:49:46,279 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [702020697] [2021-05-06 08:49:46,279 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [702020697] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:49:46,279 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:49:46,279 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-06 08:49:46,279 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39053794] [2021-05-06 08:49:46,280 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-06 08:49:46,280 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:49:46,280 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-06 08:49:46,280 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-05-06 08:49:46,281 INFO L87 Difference]: Start difference. First operand 109 states and 126 transitions. Second operand has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 4 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2021-05-06 08:49:46,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:49:46,437 INFO L93 Difference]: Finished difference Result 153 states and 196 transitions. [2021-05-06 08:49:46,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-06 08:49:46,438 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 4 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) Word has length 64 [2021-05-06 08:49:46,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:49:46,439 INFO L225 Difference]: With dead ends: 153 [2021-05-06 08:49:46,439 INFO L226 Difference]: Without dead ends: 146 [2021-05-06 08:49:46,439 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 36.4ms TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-05-06 08:49:46,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2021-05-06 08:49:46,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 139. [2021-05-06 08:49:46,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 88 states have (on average 1.2045454545454546) internal successors, (106), 92 states have internal predecessors, (106), 35 states have call successors, (35), 16 states have call predecessors, (35), 15 states have return successors, (32), 30 states have call predecessors, (32), 32 states have call successors, (32) [2021-05-06 08:49:46,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 173 transitions. [2021-05-06 08:49:46,445 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 173 transitions. Word has length 64 [2021-05-06 08:49:46,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:49:46,445 INFO L480 AbstractCegarLoop]: Abstraction has 139 states and 173 transitions. [2021-05-06 08:49:46,446 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 4 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2021-05-06 08:49:46,446 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 173 transitions. [2021-05-06 08:49:46,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-05-06 08:49:46,446 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:49:46,446 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:49:46,660 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-05-06 08:49:46,661 INFO L428 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:49:46,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:49:46,661 INFO L82 PathProgramCache]: Analyzing trace with hash 112143503, now seen corresponding path program 1 times [2021-05-06 08:49:46,661 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:49:46,661 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1558620700] [2021-05-06 08:49:46,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:49:46,668 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:49:46,668 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1854733660] [2021-05-06 08:49:46,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:49:46,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:49:46,728 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-06 08:49:46,730 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:49:46,740 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:49:46,741 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:49:46,743 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:49:46,757 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:49:46,758 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:49:46,759 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:49:46,787 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:49:46,788 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:49:46,789 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:49:46,821 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:49:46,822 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:49:46,823 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:49:46,850 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:49:46,851 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:49:46,863 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 16 proven. 92 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-05-06 08:49:46,863 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:49:46,863 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1558620700] [2021-05-06 08:49:46,863 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:49:46,863 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1854733660] [2021-05-06 08:49:46,863 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1854733660] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:49:46,863 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:49:46,863 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-06 08:49:46,864 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [257893542] [2021-05-06 08:49:46,864 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-06 08:49:46,864 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:49:46,864 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-06 08:49:46,864 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-05-06 08:49:46,865 INFO L87 Difference]: Start difference. First operand 139 states and 173 transitions. Second operand has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 states have internal predecessors, (31), 6 states have call successors, (12), 6 states have call predecessors, (12), 4 states have return successors, (10), 4 states have call predecessors, (10), 5 states have call successors, (10) [2021-05-06 08:49:46,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:49:46,942 INFO L93 Difference]: Finished difference Result 156 states and 184 transitions. [2021-05-06 08:49:46,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 08:49:46,943 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 states have internal predecessors, (31), 6 states have call successors, (12), 6 states have call predecessors, (12), 4 states have return successors, (10), 4 states have call predecessors, (10), 5 states have call successors, (10) Word has length 68 [2021-05-06 08:49:46,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:49:46,944 INFO L225 Difference]: With dead ends: 156 [2021-05-06 08:49:46,944 INFO L226 Difference]: Without dead ends: 156 [2021-05-06 08:49:46,944 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 23.4ms TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-05-06 08:49:46,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2021-05-06 08:49:46,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 155. [2021-05-06 08:49:46,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 100 states have (on average 1.16) internal successors, (116), 104 states have internal predecessors, (116), 35 states have call successors, (35), 20 states have call predecessors, (35), 19 states have return successors, (32), 30 states have call predecessors, (32), 32 states have call successors, (32) [2021-05-06 08:49:46,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 183 transitions. [2021-05-06 08:49:46,950 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 183 transitions. Word has length 68 [2021-05-06 08:49:46,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:49:46,950 INFO L480 AbstractCegarLoop]: Abstraction has 155 states and 183 transitions. [2021-05-06 08:49:46,950 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 states have internal predecessors, (31), 6 states have call successors, (12), 6 states have call predecessors, (12), 4 states have return successors, (10), 4 states have call predecessors, (10), 5 states have call successors, (10) [2021-05-06 08:49:46,951 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 183 transitions. [2021-05-06 08:49:46,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-05-06 08:49:46,951 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:49:46,951 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:49:47,164 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-05-06 08:49:47,165 INFO L428 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:49:47,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:49:47,165 INFO L82 PathProgramCache]: Analyzing trace with hash 113245770, now seen corresponding path program 1 times [2021-05-06 08:49:47,165 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:49:47,165 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1987026787] [2021-05-06 08:49:47,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:49:47,179 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:49:47,180 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1147240905] [2021-05-06 08:49:47,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:49:47,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:49:47,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 29 conjunts are in the unsatisfiable core [2021-05-06 08:49:47,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:49:47,294 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:49:47,296 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:49:47,307 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:49:47,309 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:49:47,320 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:49:47,321 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:49:47,386 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:49:47,389 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:49:47,409 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:49:47,413 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:49:47,436 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:49:47,439 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:49:47,505 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:49:47,511 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:49:47,535 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:49:47,539 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:49:47,681 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:49:47,687 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:49:47,707 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:49:47,722 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 36 proven. 10 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2021-05-06 08:49:47,722 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:49:47,722 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1987026787] [2021-05-06 08:49:47,722 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:49:47,723 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1147240905] [2021-05-06 08:49:47,723 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1147240905] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:49:47,723 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:49:47,723 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-06 08:49:47,723 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1561943373] [2021-05-06 08:49:47,723 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-06 08:49:47,723 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:49:47,724 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-06 08:49:47,724 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-05-06 08:49:47,724 INFO L87 Difference]: Start difference. First operand 155 states and 183 transitions. Second operand has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 10 states have internal predecessors, (28), 5 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 5 states have call predecessors, (10), 4 states have call successors, (10) [2021-05-06 08:49:47,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:49:47,973 INFO L93 Difference]: Finished difference Result 161 states and 188 transitions. [2021-05-06 08:49:47,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-06 08:49:47,974 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 10 states have internal predecessors, (28), 5 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 5 states have call predecessors, (10), 4 states have call successors, (10) Word has length 68 [2021-05-06 08:49:47,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:49:47,975 INFO L225 Difference]: With dead ends: 161 [2021-05-06 08:49:47,975 INFO L226 Difference]: Without dead ends: 161 [2021-05-06 08:49:47,975 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 180.7ms TimeCoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-05-06 08:49:47,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2021-05-06 08:49:47,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 159. [2021-05-06 08:49:47,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 103 states have (on average 1.1553398058252426) internal successors, (119), 107 states have internal predecessors, (119), 35 states have call successors, (35), 21 states have call predecessors, (35), 20 states have return successors, (32), 30 states have call predecessors, (32), 32 states have call successors, (32) [2021-05-06 08:49:47,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 186 transitions. [2021-05-06 08:49:47,981 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 186 transitions. Word has length 68 [2021-05-06 08:49:47,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:49:47,981 INFO L480 AbstractCegarLoop]: Abstraction has 159 states and 186 transitions. [2021-05-06 08:49:47,981 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 10 states have internal predecessors, (28), 5 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 5 states have call predecessors, (10), 4 states have call successors, (10) [2021-05-06 08:49:47,981 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 186 transitions. [2021-05-06 08:49:47,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-05-06 08:49:47,982 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:49:47,982 INFO L523 BasicCegarLoop]: trace histogram [11, 10, 10, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:49:48,196 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-05-06 08:49:48,197 INFO L428 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:49:48,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:49:48,197 INFO L82 PathProgramCache]: Analyzing trace with hash -742748636, now seen corresponding path program 1 times [2021-05-06 08:49:48,197 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:49:48,197 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [104882932] [2021-05-06 08:49:48,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:49:48,203 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:49:48,204 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1516008629] [2021-05-06 08:49:48,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:49:48,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:49:48,288 INFO L263 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-06 08:49:48,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:49:48,433 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:49:48,443 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 20 proven. 5 refuted. 0 times theorem prover too weak. 186 trivial. 0 not checked. [2021-05-06 08:49:48,444 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:49:48,444 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [104882932] [2021-05-06 08:49:48,444 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:49:48,444 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1516008629] [2021-05-06 08:49:48,444 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1516008629] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:49:48,444 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:49:48,444 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-06 08:49:48,444 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032788073] [2021-05-06 08:49:48,445 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-06 08:49:48,445 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:49:48,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-06 08:49:48,445 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-05-06 08:49:48,445 INFO L87 Difference]: Start difference. First operand 159 states and 186 transitions. Second operand has 7 states, 6 states have (on average 4.0) internal successors, (24), 6 states have internal predecessors, (24), 4 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-05-06 08:49:48,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:49:48,551 INFO L93 Difference]: Finished difference Result 180 states and 215 transitions. [2021-05-06 08:49:48,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-06 08:49:48,552 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.0) internal successors, (24), 6 states have internal predecessors, (24), 4 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 79 [2021-05-06 08:49:48,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:49:48,553 INFO L225 Difference]: With dead ends: 180 [2021-05-06 08:49:48,553 INFO L226 Difference]: Without dead ends: 151 [2021-05-06 08:49:48,553 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 47.1ms TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-05-06 08:49:48,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2021-05-06 08:49:48,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 146. [2021-05-06 08:49:48,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 93 states have (on average 1.1935483870967742) internal successors, (111), 98 states have internal predecessors, (111), 35 states have call successors, (35), 18 states have call predecessors, (35), 17 states have return successors, (31), 29 states have call predecessors, (31), 31 states have call successors, (31) [2021-05-06 08:49:48,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 177 transitions. [2021-05-06 08:49:48,559 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 177 transitions. Word has length 79 [2021-05-06 08:49:48,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:49:48,559 INFO L480 AbstractCegarLoop]: Abstraction has 146 states and 177 transitions. [2021-05-06 08:49:48,559 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 4.0) internal successors, (24), 6 states have internal predecessors, (24), 4 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-05-06 08:49:48,559 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 177 transitions. [2021-05-06 08:49:48,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-05-06 08:49:48,560 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:49:48,560 INFO L523 BasicCegarLoop]: trace histogram [11, 10, 10, 4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:49:48,780 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:49:48,780 INFO L428 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:49:48,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:49:48,781 INFO L82 PathProgramCache]: Analyzing trace with hash -1708320559, now seen corresponding path program 2 times [2021-05-06 08:49:48,781 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:49:48,781 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [400593014] [2021-05-06 08:49:48,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:49:48,787 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:49:48,787 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [761173268] [2021-05-06 08:49:48,787 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:49:48,859 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 08:49:48,859 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:49:48,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-06 08:49:48,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:49:48,872 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:49:48,876 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:49:48,879 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:49:48,894 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:49:48,895 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:49:48,896 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:49:48,924 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:49:48,925 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:49:48,926 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:49:48,956 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:49:48,957 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:49:48,958 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:49:48,988 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:49:48,990 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:49:49,007 INFO L134 CoverageAnalysis]: Checked inductivity of 224 backedges. 54 proven. 132 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-05-06 08:49:49,008 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:49:49,008 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [400593014] [2021-05-06 08:49:49,008 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:49:49,008 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [761173268] [2021-05-06 08:49:49,008 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [761173268] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:49:49,008 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:49:49,008 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-06 08:49:49,008 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [680546376] [2021-05-06 08:49:49,009 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-06 08:49:49,009 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:49:49,009 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-06 08:49:49,009 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-05-06 08:49:49,010 INFO L87 Difference]: Start difference. First operand 146 states and 177 transitions. Second operand has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 6 states have internal predecessors, (34), 6 states have call successors, (14), 6 states have call predecessors, (14), 5 states have return successors, (12), 5 states have call predecessors, (12), 6 states have call successors, (12) [2021-05-06 08:49:49,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:49:49,080 INFO L93 Difference]: Finished difference Result 148 states and 179 transitions. [2021-05-06 08:49:49,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-06 08:49:49,081 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 6 states have internal predecessors, (34), 6 states have call successors, (14), 6 states have call predecessors, (14), 5 states have return successors, (12), 5 states have call predecessors, (12), 6 states have call successors, (12) Word has length 79 [2021-05-06 08:49:49,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:49:49,082 INFO L225 Difference]: With dead ends: 148 [2021-05-06 08:49:49,082 INFO L226 Difference]: Without dead ends: 148 [2021-05-06 08:49:49,083 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 32.6ms TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-05-06 08:49:49,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2021-05-06 08:49:49,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 148. [2021-05-06 08:49:49,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 95 states have (on average 1.1894736842105262) internal successors, (113), 100 states have internal predecessors, (113), 35 states have call successors, (35), 18 states have call predecessors, (35), 17 states have return successors, (31), 29 states have call predecessors, (31), 31 states have call successors, (31) [2021-05-06 08:49:49,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 179 transitions. [2021-05-06 08:49:49,091 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 179 transitions. Word has length 79 [2021-05-06 08:49:49,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:49:49,092 INFO L480 AbstractCegarLoop]: Abstraction has 148 states and 179 transitions. [2021-05-06 08:49:49,092 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 6 states have internal predecessors, (34), 6 states have call successors, (14), 6 states have call predecessors, (14), 5 states have return successors, (12), 5 states have call predecessors, (12), 6 states have call successors, (12) [2021-05-06 08:49:49,092 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 179 transitions. [2021-05-06 08:49:49,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-05-06 08:49:49,093 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:49:49,093 INFO L523 BasicCegarLoop]: trace histogram [12, 11, 11, 4, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:49:49,308 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-05-06 08:49:49,308 INFO L428 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:49:49,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:49:49,309 INFO L82 PathProgramCache]: Analyzing trace with hash 1815149533, now seen corresponding path program 3 times [2021-05-06 08:49:49,309 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:49:49,309 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [186927126] [2021-05-06 08:49:49,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:49:49,313 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:49:49,313 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1365822699] [2021-05-06 08:49:49,313 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:49:49,363 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-06 08:49:49,364 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:49:49,365 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 16 conjunts are in the unsatisfiable core [2021-05-06 08:49:49,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:49:49,595 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:49:49,597 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:49:49,607 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:49:49,617 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 62 proven. 7 refuted. 0 times theorem prover too weak. 206 trivial. 0 not checked. [2021-05-06 08:49:49,617 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:49:49,617 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [186927126] [2021-05-06 08:49:49,617 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:49:49,617 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1365822699] [2021-05-06 08:49:49,617 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1365822699] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:49:49,617 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:49:49,617 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-06 08:49:49,617 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [758658429] [2021-05-06 08:49:49,618 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 08:49:49,618 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:49:49,618 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 08:49:49,618 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-05-06 08:49:49,619 INFO L87 Difference]: Start difference. First operand 148 states and 179 transitions. Second operand has 8 states, 8 states have (on average 2.75) internal successors, (22), 6 states have internal predecessors, (22), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) [2021-05-06 08:49:50,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:49:50,024 INFO L93 Difference]: Finished difference Result 176 states and 218 transitions. [2021-05-06 08:49:50,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 08:49:50,025 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 6 states have internal predecessors, (22), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) Word has length 82 [2021-05-06 08:49:50,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:49:50,026 INFO L225 Difference]: With dead ends: 176 [2021-05-06 08:49:50,026 INFO L226 Difference]: Without dead ends: 176 [2021-05-06 08:49:50,026 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 106.0ms TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-05-06 08:49:50,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2021-05-06 08:49:50,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 170. [2021-05-06 08:49:50,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 109 states have (on average 1.201834862385321) internal successors, (131), 116 states have internal predecessors, (131), 41 states have call successors, (41), 20 states have call predecessors, (41), 19 states have return successors, (37), 33 states have call predecessors, (37), 37 states have call successors, (37) [2021-05-06 08:49:50,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 209 transitions. [2021-05-06 08:49:50,032 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 209 transitions. Word has length 82 [2021-05-06 08:49:50,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:49:50,033 INFO L480 AbstractCegarLoop]: Abstraction has 170 states and 209 transitions. [2021-05-06 08:49:50,033 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 6 states have internal predecessors, (22), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) [2021-05-06 08:49:50,033 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 209 transitions. [2021-05-06 08:49:50,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-05-06 08:49:50,034 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:49:50,034 INFO L523 BasicCegarLoop]: trace histogram [12, 11, 11, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:49:50,255 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:49:50,256 INFO L428 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:49:50,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:49:50,256 INFO L82 PathProgramCache]: Analyzing trace with hash -1960725647, now seen corresponding path program 2 times [2021-05-06 08:49:50,256 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:49:50,256 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [797702424] [2021-05-06 08:49:50,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:49:50,271 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:49:50,271 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [310159421] [2021-05-06 08:49:50,271 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:49:50,328 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 08:49:50,329 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:49:50,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-06 08:49:50,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:49:50,341 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:49:50,343 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:49:50,343 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:49:50,355 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:49:50,357 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:49:50,358 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:49:50,385 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:49:50,387 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:49:50,387 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:49:50,416 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:49:50,417 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:49:50,418 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:49:50,447 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:49:50,448 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:49:50,448 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:49:50,473 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:49:50,474 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:49:50,486 INFO L134 CoverageAnalysis]: Checked inductivity of 262 backedges. 22 proven. 200 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-05-06 08:49:50,486 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:49:50,486 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [797702424] [2021-05-06 08:49:50,486 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:49:50,487 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [310159421] [2021-05-06 08:49:50,487 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [310159421] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:49:50,487 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:49:50,487 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-06 08:49:50,487 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [548115924] [2021-05-06 08:49:50,487 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 08:49:50,487 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:49:50,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 08:49:50,488 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-06 08:49:50,488 INFO L87 Difference]: Start difference. First operand 170 states and 209 transitions. Second operand has 8 states, 8 states have (on average 4.625) internal successors, (37), 7 states have internal predecessors, (37), 7 states have call successors, (15), 7 states have call predecessors, (15), 5 states have return successors, (13), 5 states have call predecessors, (13), 6 states have call successors, (13) [2021-05-06 08:49:50,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:49:50,574 INFO L93 Difference]: Finished difference Result 197 states and 233 transitions. [2021-05-06 08:49:50,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-06 08:49:50,575 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.625) internal successors, (37), 7 states have internal predecessors, (37), 7 states have call successors, (15), 7 states have call predecessors, (15), 5 states have return successors, (13), 5 states have call predecessors, (13), 6 states have call successors, (13) Word has length 86 [2021-05-06 08:49:50,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:49:50,577 INFO L225 Difference]: With dead ends: 197 [2021-05-06 08:49:50,577 INFO L226 Difference]: Without dead ends: 197 [2021-05-06 08:49:50,577 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 28.9ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-05-06 08:49:50,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2021-05-06 08:49:50,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 196. [2021-05-06 08:49:50,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 127 states have (on average 1.1653543307086613) internal successors, (148), 134 states have internal predecessors, (148), 44 states have call successors, (44), 25 states have call predecessors, (44), 24 states have return successors, (40), 36 states have call predecessors, (40), 40 states have call successors, (40) [2021-05-06 08:49:50,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 232 transitions. [2021-05-06 08:49:50,586 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 232 transitions. Word has length 86 [2021-05-06 08:49:50,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:49:50,586 INFO L480 AbstractCegarLoop]: Abstraction has 196 states and 232 transitions. [2021-05-06 08:49:50,586 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.625) internal successors, (37), 7 states have internal predecessors, (37), 7 states have call successors, (15), 7 states have call predecessors, (15), 5 states have return successors, (13), 5 states have call predecessors, (13), 6 states have call successors, (13) [2021-05-06 08:49:50,586 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 232 transitions. [2021-05-06 08:49:50,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-05-06 08:49:50,587 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:49:50,587 INFO L523 BasicCegarLoop]: trace histogram [12, 11, 11, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:49:50,811 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:49:50,811 INFO L428 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:49:50,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:49:50,812 INFO L82 PathProgramCache]: Analyzing trace with hash -1959623380, now seen corresponding path program 2 times [2021-05-06 08:49:50,812 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:49:50,812 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [905600324] [2021-05-06 08:49:50,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:49:50,820 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:49:50,821 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [279640259] [2021-05-06 08:49:50,821 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:49:50,880 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 08:49:50,880 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:49:50,882 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 39 conjunts are in the unsatisfiable core [2021-05-06 08:49:50,883 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:49:50,934 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:49:50,935 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:49:50,948 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:49:50,949 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:49:50,959 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:49:50,960 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:49:50,991 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:49:50,993 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:49:51,021 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:49:51,022 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:49:51,032 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:49:51,034 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:49:51,107 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:49:51,111 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:49:51,124 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:49:51,126 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:49:51,139 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:49:51,142 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:49:51,207 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:49:51,211 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:49:51,231 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:49:51,234 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:49:51,331 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:49:51,335 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:49:51,360 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:49:51,375 INFO L134 CoverageAnalysis]: Checked inductivity of 263 backedges. 36 proven. 37 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2021-05-06 08:49:51,375 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:49:51,376 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [905600324] [2021-05-06 08:49:51,376 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:49:51,376 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [279640259] [2021-05-06 08:49:51,376 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [279640259] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:49:51,376 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:49:51,376 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2021-05-06 08:49:51,376 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1492801986] [2021-05-06 08:49:51,377 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-06 08:49:51,377 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:49:51,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-06 08:49:51,378 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2021-05-06 08:49:51,378 INFO L87 Difference]: Start difference. First operand 196 states and 232 transitions. Second operand has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 13 states have internal predecessors, (31), 6 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 6 states have call predecessors, (13), 5 states have call successors, (13) [2021-05-06 08:49:51,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:49:51,902 INFO L93 Difference]: Finished difference Result 197 states and 231 transitions. [2021-05-06 08:49:51,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-06 08:49:51,903 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 13 states have internal predecessors, (31), 6 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 6 states have call predecessors, (13), 5 states have call successors, (13) Word has length 86 [2021-05-06 08:49:51,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:49:51,904 INFO L225 Difference]: With dead ends: 197 [2021-05-06 08:49:51,904 INFO L226 Difference]: Without dead ends: 197 [2021-05-06 08:49:51,904 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 71 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 228.2ms TimeCoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-05-06 08:49:51,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2021-05-06 08:49:51,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 194. [2021-05-06 08:49:51,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 126 states have (on average 1.1587301587301588) internal successors, (146), 133 states have internal predecessors, (146), 42 states have call successors, (42), 26 states have call predecessors, (42), 25 states have return successors, (39), 34 states have call predecessors, (39), 39 states have call successors, (39) [2021-05-06 08:49:51,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 227 transitions. [2021-05-06 08:49:51,910 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 227 transitions. Word has length 86 [2021-05-06 08:49:51,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:49:51,911 INFO L480 AbstractCegarLoop]: Abstraction has 194 states and 227 transitions. [2021-05-06 08:49:51,911 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 13 states have internal predecessors, (31), 6 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 6 states have call predecessors, (13), 5 states have call successors, (13) [2021-05-06 08:49:51,911 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 227 transitions. [2021-05-06 08:49:51,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-05-06 08:49:51,912 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:49:51,912 INFO L523 BasicCegarLoop]: trace histogram [14, 13, 13, 5, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:49:52,124 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-05-06 08:49:52,125 INFO L428 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:49:52,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:49:52,125 INFO L82 PathProgramCache]: Analyzing trace with hash 31379631, now seen corresponding path program 3 times [2021-05-06 08:49:52,125 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:49:52,125 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1095461694] [2021-05-06 08:49:52,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:49:52,131 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:49:52,131 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1940406469] [2021-05-06 08:49:52,131 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:49:52,280 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-05-06 08:49:52,280 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:49:52,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-06 08:49:52,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:49:52,302 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:49:52,306 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:49:52,315 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:49:52,330 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:49:52,331 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:49:52,332 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:49:52,361 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:49:52,363 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:49:52,364 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:49:52,394 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:49:52,396 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:49:52,396 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:49:52,429 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:49:52,430 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:49:52,431 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:49:52,463 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:49:52,464 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:49:52,484 INFO L134 CoverageAnalysis]: Checked inductivity of 382 backedges. 72 proven. 260 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2021-05-06 08:49:52,484 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:49:52,484 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1095461694] [2021-05-06 08:49:52,485 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:49:52,485 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1940406469] [2021-05-06 08:49:52,485 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1940406469] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:49:52,485 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:49:52,485 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-06 08:49:52,485 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236861260] [2021-05-06 08:49:52,485 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 08:49:52,486 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:49:52,486 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 08:49:52,486 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-06 08:49:52,486 INFO L87 Difference]: Start difference. First operand 194 states and 227 transitions. Second operand has 8 states, 8 states have (on average 5.0) internal successors, (40), 7 states have internal predecessors, (40), 7 states have call successors, (17), 7 states have call predecessors, (17), 6 states have return successors, (15), 6 states have call predecessors, (15), 7 states have call successors, (15) [2021-05-06 08:49:52,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:49:52,585 INFO L93 Difference]: Finished difference Result 196 states and 229 transitions. [2021-05-06 08:49:52,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-06 08:49:52,585 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 7 states have internal predecessors, (40), 7 states have call successors, (17), 7 states have call predecessors, (17), 6 states have return successors, (15), 6 states have call predecessors, (15), 7 states have call successors, (15) Word has length 97 [2021-05-06 08:49:52,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:49:52,588 INFO L225 Difference]: With dead ends: 196 [2021-05-06 08:49:52,588 INFO L226 Difference]: Without dead ends: 196 [2021-05-06 08:49:52,589 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 46.3ms TimeCoverageRelationStatistics Valid=51, Invalid=81, Unknown=0, NotChecked=0, Total=132 [2021-05-06 08:49:52,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2021-05-06 08:49:52,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 196. [2021-05-06 08:49:52,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 128 states have (on average 1.15625) internal successors, (148), 135 states have internal predecessors, (148), 42 states have call successors, (42), 26 states have call predecessors, (42), 25 states have return successors, (39), 34 states have call predecessors, (39), 39 states have call successors, (39) [2021-05-06 08:49:52,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 229 transitions. [2021-05-06 08:49:52,595 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 229 transitions. Word has length 97 [2021-05-06 08:49:52,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:49:52,595 INFO L480 AbstractCegarLoop]: Abstraction has 196 states and 229 transitions. [2021-05-06 08:49:52,595 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 7 states have internal predecessors, (40), 7 states have call successors, (17), 7 states have call predecessors, (17), 6 states have return successors, (15), 6 states have call predecessors, (15), 7 states have call successors, (15) [2021-05-06 08:49:52,595 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 229 transitions. [2021-05-06 08:49:52,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-05-06 08:49:52,596 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:49:52,596 INFO L523 BasicCegarLoop]: trace histogram [14, 13, 13, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:49:52,820 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:49:52,821 INFO L428 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:49:52,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:49:52,821 INFO L82 PathProgramCache]: Analyzing trace with hash -874901792, now seen corresponding path program 3 times [2021-05-06 08:49:52,821 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:49:52,821 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1886904833] [2021-05-06 08:49:52,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:49:52,826 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:49:52,827 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1433532925] [2021-05-06 08:49:52,827 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:49:52,918 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-06 08:49:52,918 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:49:52,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 45 conjunts are in the unsatisfiable core [2021-05-06 08:49:52,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:49:52,968 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:49:52,970 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:49:52,981 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:49:52,982 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:49:52,991 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:49:52,992 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:49:53,028 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:49:53,029 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:49:53,038 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:49:53,039 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:49:53,048 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:49:53,049 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:49:53,083 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:49:53,084 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:49:53,093 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:49:53,095 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:49:53,104 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:49:53,106 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:49:53,121 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:49:53,122 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:49:53,132 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:49:53,133 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:49:53,172 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:49:53,173 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:49:53,182 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:49:53,183 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:49:53,427 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:49:53,431 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:49:53,453 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:49:53,473 INFO L134 CoverageAnalysis]: Checked inductivity of 366 backedges. 61 proven. 29 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2021-05-06 08:49:53,473 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:49:53,473 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1886904833] [2021-05-06 08:49:53,474 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:49:53,474 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1433532925] [2021-05-06 08:49:53,474 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1433532925] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:49:53,474 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:49:53,474 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2021-05-06 08:49:53,474 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781049533] [2021-05-06 08:49:53,474 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-06 08:49:53,474 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:49:53,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-06 08:49:53,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=205, Unknown=0, NotChecked=0, Total=240 [2021-05-06 08:49:53,475 INFO L87 Difference]: Start difference. First operand 196 states and 229 transitions. Second operand has 16 states, 16 states have (on average 2.1875) internal successors, (35), 13 states have internal predecessors, (35), 6 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (15), 7 states have call predecessors, (15), 5 states have call successors, (15) [2021-05-06 08:49:54,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:49:54,404 INFO L93 Difference]: Finished difference Result 207 states and 239 transitions. [2021-05-06 08:49:54,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-06 08:49:54,405 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.1875) internal successors, (35), 13 states have internal predecessors, (35), 6 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (15), 7 states have call predecessors, (15), 5 states have call successors, (15) Word has length 100 [2021-05-06 08:49:54,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:49:54,406 INFO L225 Difference]: With dead ends: 207 [2021-05-06 08:49:54,406 INFO L226 Difference]: Without dead ends: 186 [2021-05-06 08:49:54,406 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 369.3ms TimeCoverageRelationStatistics Valid=58, Invalid=362, Unknown=0, NotChecked=0, Total=420 [2021-05-06 08:49:54,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2021-05-06 08:49:54,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 186. [2021-05-06 08:49:54,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 122 states have (on average 1.139344262295082) internal successors, (139), 128 states have internal predecessors, (139), 39 states have call successors, (39), 25 states have call predecessors, (39), 24 states have return successors, (36), 32 states have call predecessors, (36), 36 states have call successors, (36) [2021-05-06 08:49:54,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 214 transitions. [2021-05-06 08:49:54,411 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 214 transitions. Word has length 100 [2021-05-06 08:49:54,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:49:54,412 INFO L480 AbstractCegarLoop]: Abstraction has 186 states and 214 transitions. [2021-05-06 08:49:54,412 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.1875) internal successors, (35), 13 states have internal predecessors, (35), 6 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (15), 7 states have call predecessors, (15), 5 states have call successors, (15) [2021-05-06 08:49:54,412 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 214 transitions. [2021-05-06 08:49:54,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-05-06 08:49:54,413 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:49:54,413 INFO L523 BasicCegarLoop]: trace histogram [14, 13, 13, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:49:54,637 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-05-06 08:49:54,637 INFO L428 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:49:54,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:49:54,637 INFO L82 PathProgramCache]: Analyzing trace with hash -873799525, now seen corresponding path program 3 times [2021-05-06 08:49:54,637 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:49:54,637 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1279073303] [2021-05-06 08:49:54,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:49:54,642 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:49:54,642 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1835460356] [2021-05-06 08:49:54,643 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:49:55,726 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-06 08:49:55,726 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:49:55,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 40 conjunts are in the unsatisfiable core [2021-05-06 08:49:55,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:49:55,791 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:49:55,792 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:49:55,800 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:49:55,802 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:49:55,810 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:49:55,811 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:49:55,841 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:49:55,842 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:49:55,851 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:49:55,852 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:49:55,860 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:49:55,862 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:49:55,894 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:49:55,895 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:49:55,903 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:49:55,905 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:49:55,914 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:49:55,915 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:49:55,930 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:49:55,932 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:49:55,941 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:49:55,942 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:49:55,979 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:49:55,980 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:49:56,014 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:49:56,015 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:49:56,105 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:49:56,107 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:49:56,121 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:49:56,138 INFO L134 CoverageAnalysis]: Checked inductivity of 368 backedges. 26 proven. 30 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2021-05-06 08:49:56,138 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:49:56,138 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1279073303] [2021-05-06 08:49:56,138 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:49:56,138 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1835460356] [2021-05-06 08:49:56,138 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1835460356] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:49:56,138 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:49:56,138 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-05-06 08:49:56,138 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866238565] [2021-05-06 08:49:56,139 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-06 08:49:56,139 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:49:56,139 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-06 08:49:56,139 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2021-05-06 08:49:56,139 INFO L87 Difference]: Start difference. First operand 186 states and 214 transitions. Second operand has 13 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 11 states have internal predecessors, (32), 6 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 6 states have call predecessors, (15), 5 states have call successors, (15) [2021-05-06 08:49:56,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:49:56,504 INFO L93 Difference]: Finished difference Result 190 states and 217 transitions. [2021-05-06 08:49:56,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-06 08:49:56,504 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 11 states have internal predecessors, (32), 6 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 6 states have call predecessors, (15), 5 states have call successors, (15) Word has length 100 [2021-05-06 08:49:56,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:49:56,505 INFO L225 Difference]: With dead ends: 190 [2021-05-06 08:49:56,505 INFO L226 Difference]: Without dead ends: 155 [2021-05-06 08:49:56,505 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 179.4ms TimeCoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-05-06 08:49:56,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2021-05-06 08:49:56,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 155. [2021-05-06 08:49:56,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 100 states have (on average 1.16) internal successors, (116), 105 states have internal predecessors, (116), 34 states have call successors, (34), 21 states have call predecessors, (34), 20 states have return successors, (32), 28 states have call predecessors, (32), 32 states have call successors, (32) [2021-05-06 08:49:56,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 182 transitions. [2021-05-06 08:49:56,508 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 182 transitions. Word has length 100 [2021-05-06 08:49:56,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:49:56,508 INFO L480 AbstractCegarLoop]: Abstraction has 155 states and 182 transitions. [2021-05-06 08:49:56,508 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 11 states have internal predecessors, (32), 6 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 6 states have call predecessors, (15), 5 states have call successors, (15) [2021-05-06 08:49:56,509 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 182 transitions. [2021-05-06 08:49:56,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-05-06 08:49:56,509 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:49:56,510 INFO L523 BasicCegarLoop]: trace histogram [15, 14, 14, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:49:56,718 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-05-06 08:49:56,718 INFO L428 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:49:56,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:49:56,718 INFO L82 PathProgramCache]: Analyzing trace with hash 1453917651, now seen corresponding path program 4 times [2021-05-06 08:49:56,719 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:49:56,719 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1429904737] [2021-05-06 08:49:56,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:49:56,736 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:49:56,736 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [957050929] [2021-05-06 08:49:56,736 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:49:56,840 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-06 08:49:56,840 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:49:56,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-06 08:49:56,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:49:56,854 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:49:56,858 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:49:56,859 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:49:56,871 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:49:56,872 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:49:56,874 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:49:56,900 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:49:56,902 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:49:56,902 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:49:56,933 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:49:56,934 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:49:56,935 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:49:56,962 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:49:56,966 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:49:56,966 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:49:56,995 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:49:56,997 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:49:56,997 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:49:57,022 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:49:57,023 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:49:57,035 INFO L134 CoverageAnalysis]: Checked inductivity of 430 backedges. 28 proven. 350 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2021-05-06 08:49:57,035 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:49:57,035 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1429904737] [2021-05-06 08:49:57,035 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:49:57,035 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [957050929] [2021-05-06 08:49:57,035 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [957050929] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:49:57,036 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:49:57,036 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-06 08:49:57,036 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [135295702] [2021-05-06 08:49:57,036 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-06 08:49:57,036 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:49:57,040 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-06 08:49:57,040 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-05-06 08:49:57,040 INFO L87 Difference]: Start difference. First operand 155 states and 182 transitions. Second operand has 9 states, 9 states have (on average 4.777777777777778) internal successors, (43), 8 states have internal predecessors, (43), 8 states have call successors, (18), 8 states have call predecessors, (18), 6 states have return successors, (16), 6 states have call predecessors, (16), 7 states have call successors, (16) [2021-05-06 08:49:57,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:49:57,143 INFO L93 Difference]: Finished difference Result 186 states and 216 transitions. [2021-05-06 08:49:57,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-06 08:49:57,144 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.777777777777778) internal successors, (43), 8 states have internal predecessors, (43), 8 states have call successors, (18), 8 states have call predecessors, (18), 6 states have return successors, (16), 6 states have call predecessors, (16), 7 states have call successors, (16) Word has length 104 [2021-05-06 08:49:57,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:49:57,145 INFO L225 Difference]: With dead ends: 186 [2021-05-06 08:49:57,145 INFO L226 Difference]: Without dead ends: 186 [2021-05-06 08:49:57,145 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 34.8ms TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-05-06 08:49:57,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2021-05-06 08:49:57,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 185. [2021-05-06 08:49:57,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 121 states have (on average 1.1487603305785123) internal successors, (139), 126 states have internal predecessors, (139), 39 states have call successors, (39), 25 states have call predecessors, (39), 24 states have return successors, (37), 33 states have call predecessors, (37), 37 states have call successors, (37) [2021-05-06 08:49:57,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 215 transitions. [2021-05-06 08:49:57,150 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 215 transitions. Word has length 104 [2021-05-06 08:49:57,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:49:57,150 INFO L480 AbstractCegarLoop]: Abstraction has 185 states and 215 transitions. [2021-05-06 08:49:57,151 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.777777777777778) internal successors, (43), 8 states have internal predecessors, (43), 8 states have call successors, (18), 8 states have call predecessors, (18), 6 states have return successors, (16), 6 states have call predecessors, (16), 7 states have call successors, (16) [2021-05-06 08:49:57,151 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 215 transitions. [2021-05-06 08:49:57,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-05-06 08:49:57,151 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:49:57,151 INFO L523 BasicCegarLoop]: trace histogram [15, 14, 14, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:49:57,375 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:49:57,375 INFO L428 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:49:57,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:49:57,376 INFO L82 PathProgramCache]: Analyzing trace with hash 1455019918, now seen corresponding path program 4 times [2021-05-06 08:49:57,376 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:49:57,376 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1021582962] [2021-05-06 08:49:57,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:49:57,381 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:49:57,382 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1836928009] [2021-05-06 08:49:57,382 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:49:57,479 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-06 08:49:57,480 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:49:57,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 34 conjunts are in the unsatisfiable core [2021-05-06 08:49:57,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:49:57,573 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:49:57,574 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:49:57,586 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:49:57,587 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:49:57,597 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:49:57,598 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:49:57,629 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:49:57,630 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:49:57,639 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:49:57,640 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:49:57,649 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:49:57,651 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:49:57,693 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:49:57,694 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:49:57,705 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:49:57,707 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:49:57,716 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:49:57,718 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:49:57,760 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:49:57,763 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:49:57,779 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:49:57,782 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:49:57,852 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:49:57,855 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:49:57,877 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:49:57,894 INFO L134 CoverageAnalysis]: Checked inductivity of 431 backedges. 28 proven. 39 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2021-05-06 08:49:57,894 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:49:57,894 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1021582962] [2021-05-06 08:49:57,894 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:49:57,894 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1836928009] [2021-05-06 08:49:57,894 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1836928009] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:49:57,894 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:49:57,894 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-06 08:49:57,894 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [547296629] [2021-05-06 08:49:57,895 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-06 08:49:57,895 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:49:57,896 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-06 08:49:57,896 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-05-06 08:49:57,897 INFO L87 Difference]: Start difference. First operand 185 states and 215 transitions. Second operand has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 10 states have internal predecessors, (31), 7 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) [2021-05-06 08:49:58,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:49:58,145 INFO L93 Difference]: Finished difference Result 203 states and 240 transitions. [2021-05-06 08:49:58,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-06 08:49:58,146 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 10 states have internal predecessors, (31), 7 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) Word has length 104 [2021-05-06 08:49:58,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:49:58,147 INFO L225 Difference]: With dead ends: 203 [2021-05-06 08:49:58,147 INFO L226 Difference]: Without dead ends: 203 [2021-05-06 08:49:58,147 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 162.0ms TimeCoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2021-05-06 08:49:58,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2021-05-06 08:49:58,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 200. [2021-05-06 08:49:58,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200 states, 130 states have (on average 1.1615384615384616) internal successors, (151), 135 states have internal predecessors, (151), 43 states have call successors, (43), 27 states have call predecessors, (43), 26 states have return successors, (41), 37 states have call predecessors, (41), 41 states have call successors, (41) [2021-05-06 08:49:58,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 235 transitions. [2021-05-06 08:49:58,153 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 235 transitions. Word has length 104 [2021-05-06 08:49:58,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:49:58,153 INFO L480 AbstractCegarLoop]: Abstraction has 200 states and 235 transitions. [2021-05-06 08:49:58,153 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 10 states have internal predecessors, (31), 7 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) [2021-05-06 08:49:58,153 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 235 transitions. [2021-05-06 08:49:58,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-05-06 08:49:58,154 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:49:58,154 INFO L523 BasicCegarLoop]: trace histogram [17, 16, 16, 6, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:49:58,369 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-05-06 08:49:58,369 INFO L428 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:49:58,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:49:58,369 INFO L82 PathProgramCache]: Analyzing trace with hash 1693551885, now seen corresponding path program 4 times [2021-05-06 08:49:58,370 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:49:58,370 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [707191908] [2021-05-06 08:49:58,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:49:58,375 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:49:58,376 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [988489442] [2021-05-06 08:49:58,376 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:49:58,441 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-06 08:49:58,442 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:49:58,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-06 08:49:58,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:49:58,451 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:49:58,452 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:49:58,453 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:49:58,463 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:49:58,465 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:49:58,465 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:49:58,491 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:49:58,493 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:49:58,493 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:49:58,520 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:49:58,521 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:49:58,522 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:49:58,549 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:49:58,551 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:49:58,551 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:49:58,591 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:49:58,592 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:49:58,593 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:49:58,622 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:49:58,623 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:49:58,642 INFO L134 CoverageAnalysis]: Checked inductivity of 582 backedges. 90 proven. 430 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2021-05-06 08:49:58,642 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:49:58,642 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [707191908] [2021-05-06 08:49:58,642 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:49:58,642 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [988489442] [2021-05-06 08:49:58,643 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [988489442] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:49:58,643 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:49:58,643 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-06 08:49:58,643 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [491199078] [2021-05-06 08:49:58,644 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-06 08:49:58,644 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:49:58,644 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-06 08:49:58,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-05-06 08:49:58,645 INFO L87 Difference]: Start difference. First operand 200 states and 235 transitions. Second operand has 9 states, 9 states have (on average 5.111111111111111) internal successors, (46), 8 states have internal predecessors, (46), 8 states have call successors, (20), 8 states have call predecessors, (20), 7 states have return successors, (18), 7 states have call predecessors, (18), 8 states have call successors, (18) [2021-05-06 08:49:58,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:49:58,775 INFO L93 Difference]: Finished difference Result 202 states and 237 transitions. [2021-05-06 08:49:58,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-06 08:49:58,775 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.111111111111111) internal successors, (46), 8 states have internal predecessors, (46), 8 states have call successors, (20), 8 states have call predecessors, (20), 7 states have return successors, (18), 7 states have call predecessors, (18), 8 states have call successors, (18) Word has length 115 [2021-05-06 08:49:58,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:49:58,776 INFO L225 Difference]: With dead ends: 202 [2021-05-06 08:49:58,776 INFO L226 Difference]: Without dead ends: 202 [2021-05-06 08:49:58,777 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 73.0ms TimeCoverageRelationStatistics Valid=70, Invalid=112, Unknown=0, NotChecked=0, Total=182 [2021-05-06 08:49:58,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2021-05-06 08:49:58,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 202. [2021-05-06 08:49:58,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202 states, 132 states have (on average 1.1590909090909092) internal successors, (153), 137 states have internal predecessors, (153), 43 states have call successors, (43), 27 states have call predecessors, (43), 26 states have return successors, (41), 37 states have call predecessors, (41), 41 states have call successors, (41) [2021-05-06 08:49:58,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 237 transitions. [2021-05-06 08:49:58,782 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 237 transitions. Word has length 115 [2021-05-06 08:49:58,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:49:58,783 INFO L480 AbstractCegarLoop]: Abstraction has 202 states and 237 transitions. [2021-05-06 08:49:58,783 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 5.111111111111111) internal successors, (46), 8 states have internal predecessors, (46), 8 states have call successors, (20), 8 states have call predecessors, (20), 7 states have return successors, (18), 7 states have call predecessors, (18), 8 states have call successors, (18) [2021-05-06 08:49:58,783 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 237 transitions. [2021-05-06 08:49:58,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2021-05-06 08:49:58,784 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:49:58,784 INFO L523 BasicCegarLoop]: trace histogram [17, 16, 16, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:49:59,007 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:49:59,008 INFO L428 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:49:59,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:49:59,008 INFO L82 PathProgramCache]: Analyzing trace with hash 220761538, now seen corresponding path program 5 times [2021-05-06 08:49:59,008 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:49:59,008 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [30346809] [2021-05-06 08:49:59,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:49:59,015 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:49:59,016 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1696272916] [2021-05-06 08:49:59,016 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:49:59,167 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-05-06 08:49:59,167 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:49:59,168 INFO L263 TraceCheckSpWp]: Trace formula consists of 323 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-06 08:49:59,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:49:59,181 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:49:59,182 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:49:59,183 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:49:59,193 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:49:59,195 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:49:59,195 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:49:59,221 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:49:59,223 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:49:59,223 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:49:59,253 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:49:59,254 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:49:59,255 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:49:59,282 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:49:59,284 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:49:59,284 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:49:59,313 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:49:59,314 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:49:59,314 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:49:59,339 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:49:59,340 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:49:59,340 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:49:59,363 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:49:59,365 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:49:59,378 INFO L134 CoverageAnalysis]: Checked inductivity of 558 backedges. 32 proven. 470 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2021-05-06 08:49:59,378 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:49:59,378 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [30346809] [2021-05-06 08:49:59,378 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:49:59,378 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1696272916] [2021-05-06 08:49:59,378 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1696272916] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:49:59,378 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:49:59,379 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-06 08:49:59,379 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [172637520] [2021-05-06 08:49:59,379 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-06 08:49:59,379 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:49:59,379 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-06 08:49:59,379 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-05-06 08:49:59,380 INFO L87 Difference]: Start difference. First operand 202 states and 237 transitions. Second operand has 10 states, 10 states have (on average 5.0) internal successors, (50), 9 states have internal predecessors, (50), 9 states have call successors, (20), 9 states have call predecessors, (20), 7 states have return successors, (18), 7 states have call predecessors, (18), 8 states have call successors, (18) [2021-05-06 08:49:59,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:49:59,519 INFO L93 Difference]: Finished difference Result 254 states and 291 transitions. [2021-05-06 08:49:59,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-06 08:49:59,521 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.0) internal successors, (50), 9 states have internal predecessors, (50), 9 states have call successors, (20), 9 states have call predecessors, (20), 7 states have return successors, (18), 7 states have call predecessors, (18), 8 states have call successors, (18) Word has length 118 [2021-05-06 08:49:59,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:49:59,522 INFO L225 Difference]: With dead ends: 254 [2021-05-06 08:49:59,522 INFO L226 Difference]: Without dead ends: 252 [2021-05-06 08:49:59,522 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 47.4ms TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-05-06 08:49:59,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2021-05-06 08:49:59,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 249. [2021-05-06 08:49:59,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 249 states, 166 states have (on average 1.144578313253012) internal successors, (190), 171 states have internal predecessors, (190), 50 states have call successors, (50), 34 states have call predecessors, (50), 32 states have return successors, (47), 43 states have call predecessors, (47), 47 states have call successors, (47) [2021-05-06 08:49:59,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 287 transitions. [2021-05-06 08:49:59,531 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 287 transitions. Word has length 118 [2021-05-06 08:49:59,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:49:59,531 INFO L480 AbstractCegarLoop]: Abstraction has 249 states and 287 transitions. [2021-05-06 08:49:59,531 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 5.0) internal successors, (50), 9 states have internal predecessors, (50), 9 states have call successors, (20), 9 states have call predecessors, (20), 7 states have return successors, (18), 7 states have call predecessors, (18), 8 states have call successors, (18) [2021-05-06 08:49:59,531 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 287 transitions. [2021-05-06 08:49:59,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2021-05-06 08:49:59,532 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:49:59,532 INFO L523 BasicCegarLoop]: trace histogram [17, 16, 16, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:49:59,745 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-05-06 08:49:59,745 INFO L428 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:49:59,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:49:59,746 INFO L82 PathProgramCache]: Analyzing trace with hash 221863805, now seen corresponding path program 5 times [2021-05-06 08:49:59,746 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:49:59,746 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [737707670] [2021-05-06 08:49:59,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:49:59,753 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:49:59,753 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1559656411] [2021-05-06 08:49:59,753 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:49:59,870 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-05-06 08:49:59,870 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:49:59,872 INFO L263 TraceCheckSpWp]: Trace formula consists of 323 conjuncts, 57 conjunts are in the unsatisfiable core [2021-05-06 08:49:59,873 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:50:00,068 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:00,069 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:00,080 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:00,081 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:00,090 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:00,092 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:00,148 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:00,150 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:00,167 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:00,169 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:00,262 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:00,265 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:00,285 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:00,288 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:00,415 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:00,418 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:00,442 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:00,464 INFO L134 CoverageAnalysis]: Checked inductivity of 560 backedges. 104 proven. 93 refuted. 0 times theorem prover too weak. 363 trivial. 0 not checked. [2021-05-06 08:50:00,464 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:50:00,464 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [737707670] [2021-05-06 08:50:00,465 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:50:00,465 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1559656411] [2021-05-06 08:50:00,465 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1559656411] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:50:00,465 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:50:00,465 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2021-05-06 08:50:00,465 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1119546144] [2021-05-06 08:50:00,465 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-06 08:50:00,465 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:50:00,466 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-06 08:50:00,466 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=180, Unknown=0, NotChecked=0, Total=210 [2021-05-06 08:50:00,466 INFO L87 Difference]: Start difference. First operand 249 states and 287 transitions. Second operand has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 14 states have internal predecessors, (38), 8 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 7 states have call predecessors, (18), 7 states have call successors, (18) [2021-05-06 08:50:01,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:50:01,050 INFO L93 Difference]: Finished difference Result 264 states and 306 transitions. [2021-05-06 08:50:01,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-06 08:50:01,051 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 14 states have internal predecessors, (38), 8 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 7 states have call predecessors, (18), 7 states have call successors, (18) Word has length 118 [2021-05-06 08:50:01,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:50:01,052 INFO L225 Difference]: With dead ends: 264 [2021-05-06 08:50:01,052 INFO L226 Difference]: Without dead ends: 264 [2021-05-06 08:50:01,052 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 101 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 337.2ms TimeCoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-05-06 08:50:01,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2021-05-06 08:50:01,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 262. [2021-05-06 08:50:01,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 262 states, 175 states have (on average 1.1485714285714286) internal successors, (201), 180 states have internal predecessors, (201), 52 states have call successors, (52), 35 states have call predecessors, (52), 34 states have return successors, (50), 46 states have call predecessors, (50), 50 states have call successors, (50) [2021-05-06 08:50:01,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 303 transitions. [2021-05-06 08:50:01,059 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 303 transitions. Word has length 118 [2021-05-06 08:50:01,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:50:01,060 INFO L480 AbstractCegarLoop]: Abstraction has 262 states and 303 transitions. [2021-05-06 08:50:01,060 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 14 states have internal predecessors, (38), 8 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 7 states have call predecessors, (18), 7 states have call successors, (18) [2021-05-06 08:50:01,060 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 303 transitions. [2021-05-06 08:50:01,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2021-05-06 08:50:01,061 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:50:01,061 INFO L523 BasicCegarLoop]: trace histogram [18, 17, 17, 5, 5, 5, 5, 5, 5, 5, 5, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:50:01,273 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-05-06 08:50:01,273 INFO L428 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:50:01,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:50:01,273 INFO L82 PathProgramCache]: Analyzing trace with hash 1024071024, now seen corresponding path program 6 times [2021-05-06 08:50:01,273 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:50:01,273 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [116443906] [2021-05-06 08:50:01,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:50:01,279 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:50:01,279 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [350382951] [2021-05-06 08:50:01,279 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:50:01,403 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-05-06 08:50:01,404 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:50:01,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 28 conjunts are in the unsatisfiable core [2021-05-06 08:50:01,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:50:04,123 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:04,124 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:04,134 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:04,149 INFO L134 CoverageAnalysis]: Checked inductivity of 641 backedges. 93 proven. 19 refuted. 0 times theorem prover too weak. 529 trivial. 0 not checked. [2021-05-06 08:50:04,149 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:50:04,149 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [116443906] [2021-05-06 08:50:04,149 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:50:04,149 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [350382951] [2021-05-06 08:50:04,149 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [350382951] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:50:04,149 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:50:04,149 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-06 08:50:04,149 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172355136] [2021-05-06 08:50:04,150 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-06 08:50:04,150 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:50:04,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-06 08:50:04,150 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-05-06 08:50:04,150 INFO L87 Difference]: Start difference. First operand 262 states and 303 transitions. Second operand has 10 states, 10 states have (on average 2.9) internal successors, (29), 9 states have internal predecessors, (29), 4 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 4 states have call predecessors, (11), 3 states have call successors, (11) [2021-05-06 08:50:09,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:50:09,376 INFO L93 Difference]: Finished difference Result 285 states and 329 transitions. [2021-05-06 08:50:09,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-06 08:50:09,376 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.9) internal successors, (29), 9 states have internal predecessors, (29), 4 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 4 states have call predecessors, (11), 3 states have call successors, (11) Word has length 122 [2021-05-06 08:50:09,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:50:09,377 INFO L225 Difference]: With dead ends: 285 [2021-05-06 08:50:09,377 INFO L226 Difference]: Without dead ends: 285 [2021-05-06 08:50:09,378 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 2550.8ms TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-05-06 08:50:09,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285 states. [2021-05-06 08:50:09,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 285 to 268. [2021-05-06 08:50:09,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 268 states, 179 states have (on average 1.1340782122905029) internal successors, (203), 186 states have internal predecessors, (203), 52 states have call successors, (52), 37 states have call predecessors, (52), 36 states have return successors, (50), 44 states have call predecessors, (50), 50 states have call successors, (50) [2021-05-06 08:50:09,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 305 transitions. [2021-05-06 08:50:09,385 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 305 transitions. Word has length 122 [2021-05-06 08:50:09,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:50:09,385 INFO L480 AbstractCegarLoop]: Abstraction has 268 states and 305 transitions. [2021-05-06 08:50:09,385 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.9) internal successors, (29), 9 states have internal predecessors, (29), 4 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 4 states have call predecessors, (11), 3 states have call successors, (11) [2021-05-06 08:50:09,385 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 305 transitions. [2021-05-06 08:50:09,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2021-05-06 08:50:09,386 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:50:09,386 INFO L523 BasicCegarLoop]: trace histogram [18, 17, 17, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:50:09,609 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,28 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:50:09,610 INFO L428 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:50:09,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:50:09,610 INFO L82 PathProgramCache]: Analyzing trace with hash -2136136717, now seen corresponding path program 7 times [2021-05-06 08:50:09,610 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:50:09,610 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1641571077] [2021-05-06 08:50:09,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:50:09,617 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:50:09,617 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1524439600] [2021-05-06 08:50:09,617 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:50:09,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:50:09,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 332 conjuncts, 38 conjunts are in the unsatisfiable core [2021-05-06 08:50:09,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:50:09,726 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:09,728 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:09,737 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:09,739 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:09,747 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:09,748 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:09,782 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:09,783 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:09,789 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:09,790 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:09,797 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:09,798 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:09,833 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:09,834 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:09,843 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:09,845 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:09,853 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:09,854 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:09,893 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:09,894 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:09,904 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:09,905 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:09,918 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:09,919 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:09,957 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:09,959 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:09,972 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:09,974 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:10,014 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:10,044 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:10,045 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:10,055 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:10,057 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:10,107 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:10,109 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:10,120 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:10,122 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:10,138 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:10,156 INFO L134 CoverageAnalysis]: Checked inductivity of 628 backedges. 39 proven. 93 refuted. 0 times theorem prover too weak. 496 trivial. 0 not checked. [2021-05-06 08:50:10,157 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:50:10,157 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1641571077] [2021-05-06 08:50:10,157 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:50:10,157 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1524439600] [2021-05-06 08:50:10,157 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1524439600] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:50:10,157 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:50:10,157 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2021-05-06 08:50:10,157 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [855078769] [2021-05-06 08:50:10,158 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-06 08:50:10,159 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:50:10,159 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-06 08:50:10,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2021-05-06 08:50:10,159 INFO L87 Difference]: Start difference. First operand 268 states and 305 transitions. Second operand has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 states have internal predecessors, (38), 8 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 8 states have call predecessors, (19), 8 states have call successors, (19) [2021-05-06 08:50:10,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:50:10,731 INFO L93 Difference]: Finished difference Result 285 states and 324 transitions. [2021-05-06 08:50:10,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-06 08:50:10,732 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 states have internal predecessors, (38), 8 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 8 states have call predecessors, (19), 8 states have call successors, (19) Word has length 123 [2021-05-06 08:50:10,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:50:10,733 INFO L225 Difference]: With dead ends: 285 [2021-05-06 08:50:10,733 INFO L226 Difference]: Without dead ends: 284 [2021-05-06 08:50:10,734 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 109 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 236.8ms TimeCoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-05-06 08:50:10,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2021-05-06 08:50:10,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 281. [2021-05-06 08:50:10,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 281 states, 187 states have (on average 1.1283422459893049) internal successors, (211), 196 states have internal predecessors, (211), 55 states have call successors, (55), 39 states have call predecessors, (55), 38 states have return successors, (52), 45 states have call predecessors, (52), 52 states have call successors, (52) [2021-05-06 08:50:10,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 318 transitions. [2021-05-06 08:50:10,741 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 318 transitions. Word has length 123 [2021-05-06 08:50:10,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:50:10,741 INFO L480 AbstractCegarLoop]: Abstraction has 281 states and 318 transitions. [2021-05-06 08:50:10,741 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 states have internal predecessors, (38), 8 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 8 states have call predecessors, (19), 8 states have call successors, (19) [2021-05-06 08:50:10,741 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 318 transitions. [2021-05-06 08:50:10,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2021-05-06 08:50:10,742 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:50:10,742 INFO L523 BasicCegarLoop]: trace histogram [19, 18, 18, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:50:10,967 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:50:10,968 INFO L428 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:50:10,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:50:10,968 INFO L82 PathProgramCache]: Analyzing trace with hash -1840773263, now seen corresponding path program 6 times [2021-05-06 08:50:10,968 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:50:10,968 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [582705447] [2021-05-06 08:50:10,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:50:10,973 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:50:10,973 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [516980175] [2021-05-06 08:50:10,974 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:50:11,570 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-05-06 08:50:11,570 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:50:11,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 311 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-06 08:50:11,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:50:11,594 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:11,595 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:11,596 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:11,605 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:11,606 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:11,606 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:11,628 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:11,629 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:11,630 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:11,660 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:11,661 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:11,661 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:11,690 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:11,691 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:11,692 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:11,721 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:11,722 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:11,723 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:11,744 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:11,745 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:11,746 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:11,767 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:11,768 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:11,768 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:11,790 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:11,791 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:11,802 INFO L134 CoverageAnalysis]: Checked inductivity of 708 backedges. 36 proven. 612 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-05-06 08:50:11,802 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:50:11,802 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [582705447] [2021-05-06 08:50:11,802 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:50:11,803 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [516980175] [2021-05-06 08:50:11,803 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [516980175] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:50:11,803 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:50:11,803 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-06 08:50:11,803 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2082569707] [2021-05-06 08:50:11,803 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-06 08:50:11,803 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:50:11,804 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-06 08:50:11,804 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2021-05-06 08:50:11,804 INFO L87 Difference]: Start difference. First operand 281 states and 318 transitions. Second operand has 11 states, 11 states have (on average 5.181818181818182) internal successors, (57), 10 states have internal predecessors, (57), 10 states have call successors, (22), 10 states have call predecessors, (22), 8 states have return successors, (20), 8 states have call predecessors, (20), 9 states have call successors, (20) [2021-05-06 08:50:12,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:50:12,003 INFO L93 Difference]: Finished difference Result 355 states and 399 transitions. [2021-05-06 08:50:12,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-06 08:50:12,004 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.181818181818182) internal successors, (57), 10 states have internal predecessors, (57), 10 states have call successors, (22), 10 states have call predecessors, (22), 8 states have return successors, (20), 8 states have call predecessors, (20), 9 states have call successors, (20) Word has length 132 [2021-05-06 08:50:12,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:50:12,005 INFO L225 Difference]: With dead ends: 355 [2021-05-06 08:50:12,005 INFO L226 Difference]: Without dead ends: 353 [2021-05-06 08:50:12,007 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 65.6ms TimeCoverageRelationStatistics Valid=65, Invalid=117, Unknown=0, NotChecked=0, Total=182 [2021-05-06 08:50:12,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 353 states. [2021-05-06 08:50:12,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 353 to 338. [2021-05-06 08:50:12,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 338 states, 228 states have (on average 1.1271929824561404) internal successors, (257), 237 states have internal predecessors, (257), 65 states have call successors, (65), 46 states have call predecessors, (65), 44 states have return successors, (61), 54 states have call predecessors, (61), 61 states have call successors, (61) [2021-05-06 08:50:12,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 338 states to 338 states and 383 transitions. [2021-05-06 08:50:12,016 INFO L78 Accepts]: Start accepts. Automaton has 338 states and 383 transitions. Word has length 132 [2021-05-06 08:50:12,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:50:12,017 INFO L480 AbstractCegarLoop]: Abstraction has 338 states and 383 transitions. [2021-05-06 08:50:12,017 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 5.181818181818182) internal successors, (57), 10 states have internal predecessors, (57), 10 states have call successors, (22), 10 states have call predecessors, (22), 8 states have return successors, (20), 8 states have call predecessors, (20), 9 states have call successors, (20) [2021-05-06 08:50:12,017 INFO L276 IsEmpty]: Start isEmpty. Operand 338 states and 383 transitions. [2021-05-06 08:50:12,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2021-05-06 08:50:12,018 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:50:12,018 INFO L523 BasicCegarLoop]: trace histogram [19, 18, 18, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:50:12,226 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2021-05-06 08:50:12,226 INFO L428 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:50:12,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:50:12,226 INFO L82 PathProgramCache]: Analyzing trace with hash -1839670996, now seen corresponding path program 8 times [2021-05-06 08:50:12,226 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:50:12,226 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1632587354] [2021-05-06 08:50:12,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:50:12,232 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:50:12,232 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [651970845] [2021-05-06 08:50:12,232 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:50:12,328 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 08:50:12,329 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:50:12,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 356 conjuncts, 64 conjunts are in the unsatisfiable core [2021-05-06 08:50:12,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:50:12,382 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:12,384 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:12,392 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:12,393 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:12,401 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:12,403 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:12,434 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:12,435 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:12,442 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:12,443 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:12,450 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:12,451 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:12,504 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:12,505 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:12,513 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:12,513 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:12,521 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:12,522 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:12,566 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:12,568 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:12,581 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:12,583 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:12,593 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:12,595 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:12,657 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:12,660 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:12,687 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:12,689 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:12,767 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:12,776 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:12,796 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:12,799 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:12,908 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:12,911 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:12,967 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:12,969 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:13,056 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:13,067 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:13,090 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:13,109 INFO L134 CoverageAnalysis]: Checked inductivity of 711 backedges. 94 proven. 101 refuted. 0 times theorem prover too weak. 516 trivial. 0 not checked. [2021-05-06 08:50:13,109 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:50:13,109 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1632587354] [2021-05-06 08:50:13,109 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:50:13,109 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [651970845] [2021-05-06 08:50:13,109 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [651970845] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:50:13,109 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:50:13,109 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2021-05-06 08:50:13,110 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [989913670] [2021-05-06 08:50:13,110 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-05-06 08:50:13,110 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:50:13,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-05-06 08:50:13,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=329, Unknown=0, NotChecked=0, Total=380 [2021-05-06 08:50:13,111 INFO L87 Difference]: Start difference. First operand 338 states and 383 transitions. Second operand has 20 states, 20 states have (on average 2.1) internal successors, (42), 18 states have internal predecessors, (42), 9 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (20), 9 states have call predecessors, (20), 8 states have call successors, (20) [2021-05-06 08:50:14,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:50:14,062 INFO L93 Difference]: Finished difference Result 368 states and 417 transitions. [2021-05-06 08:50:14,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-06 08:50:14,063 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.1) internal successors, (42), 18 states have internal predecessors, (42), 9 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (20), 9 states have call predecessors, (20), 8 states have call successors, (20) Word has length 132 [2021-05-06 08:50:14,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:50:14,065 INFO L225 Difference]: With dead ends: 368 [2021-05-06 08:50:14,065 INFO L226 Difference]: Without dead ends: 354 [2021-05-06 08:50:14,065 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 111 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 418.1ms TimeCoverageRelationStatistics Valid=66, Invalid=440, Unknown=0, NotChecked=0, Total=506 [2021-05-06 08:50:14,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 354 states. [2021-05-06 08:50:14,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 354 to 344. [2021-05-06 08:50:14,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 344 states, 232 states have (on average 1.125) internal successors, (261), 241 states have internal predecessors, (261), 67 states have call successors, (67), 46 states have call predecessors, (67), 44 states have return successors, (63), 56 states have call predecessors, (63), 63 states have call successors, (63) [2021-05-06 08:50:14,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 391 transitions. [2021-05-06 08:50:14,073 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 391 transitions. Word has length 132 [2021-05-06 08:50:14,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:50:14,073 INFO L480 AbstractCegarLoop]: Abstraction has 344 states and 391 transitions. [2021-05-06 08:50:14,073 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.1) internal successors, (42), 18 states have internal predecessors, (42), 9 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (20), 9 states have call predecessors, (20), 8 states have call successors, (20) [2021-05-06 08:50:14,074 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 391 transitions. [2021-05-06 08:50:14,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2021-05-06 08:50:14,074 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:50:14,075 INFO L523 BasicCegarLoop]: trace histogram [19, 18, 18, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:50:14,288 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:50:14,289 INFO L428 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:50:14,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:50:14,289 INFO L82 PathProgramCache]: Analyzing trace with hash -1628320083, now seen corresponding path program 1 times [2021-05-06 08:50:14,289 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:50:14,289 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2091430375] [2021-05-06 08:50:14,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:50:14,295 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:50:14,295 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1905694515] [2021-05-06 08:50:14,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:50:14,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:50:14,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 56 conjunts are in the unsatisfiable core [2021-05-06 08:50:14,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:50:14,565 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:14,566 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:14,573 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:14,575 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:14,583 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:14,585 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:14,621 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:14,625 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:14,640 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:14,643 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:14,723 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:14,726 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:14,742 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:14,744 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:14,836 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:14,838 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:14,855 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:14,857 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:15,020 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:15,023 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:15,049 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:15,073 INFO L134 CoverageAnalysis]: Checked inductivity of 711 backedges. 88 proven. 107 refuted. 0 times theorem prover too weak. 516 trivial. 0 not checked. [2021-05-06 08:50:15,073 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:50:15,073 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2091430375] [2021-05-06 08:50:15,073 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:50:15,073 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1905694515] [2021-05-06 08:50:15,073 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1905694515] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:50:15,073 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:50:15,073 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2021-05-06 08:50:15,073 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [127650529] [2021-05-06 08:50:15,074 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-06 08:50:15,074 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:50:15,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-06 08:50:15,075 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=208, Unknown=0, NotChecked=0, Total=240 [2021-05-06 08:50:15,075 INFO L87 Difference]: Start difference. First operand 344 states and 391 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 9 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (20), 8 states have call predecessors, (20), 8 states have call successors, (20) [2021-05-06 08:50:15,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:50:15,988 INFO L93 Difference]: Finished difference Result 373 states and 418 transitions. [2021-05-06 08:50:15,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-06 08:50:15,989 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 9 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (20), 8 states have call predecessors, (20), 8 states have call successors, (20) Word has length 132 [2021-05-06 08:50:15,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:50:15,990 INFO L225 Difference]: With dead ends: 373 [2021-05-06 08:50:15,990 INFO L226 Difference]: Without dead ends: 359 [2021-05-06 08:50:15,990 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 115 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 407.0ms TimeCoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-05-06 08:50:15,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 359 states. [2021-05-06 08:50:15,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 359 to 335. [2021-05-06 08:50:15,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 335 states, 226 states have (on average 1.1238938053097345) internal successors, (254), 234 states have internal predecessors, (254), 64 states have call successors, (64), 46 states have call predecessors, (64), 44 states have return successors, (60), 54 states have call predecessors, (60), 60 states have call successors, (60) [2021-05-06 08:50:15,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 335 states to 335 states and 378 transitions. [2021-05-06 08:50:15,998 INFO L78 Accepts]: Start accepts. Automaton has 335 states and 378 transitions. Word has length 132 [2021-05-06 08:50:15,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:50:15,998 INFO L480 AbstractCegarLoop]: Abstraction has 335 states and 378 transitions. [2021-05-06 08:50:15,999 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 9 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (20), 8 states have call predecessors, (20), 8 states have call successors, (20) [2021-05-06 08:50:15,999 INFO L276 IsEmpty]: Start isEmpty. Operand 335 states and 378 transitions. [2021-05-06 08:50:15,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2021-05-06 08:50:16,000 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:50:16,000 INFO L523 BasicCegarLoop]: trace histogram [20, 19, 19, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:50:16,224 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-05-06 08:50:16,224 INFO L428 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:50:16,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:50:16,224 INFO L82 PathProgramCache]: Analyzing trace with hash 1133423071, now seen corresponding path program 9 times [2021-05-06 08:50:16,225 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:50:16,225 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1288463177] [2021-05-06 08:50:16,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:50:16,231 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:50:16,232 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [476403377] [2021-05-06 08:50:16,232 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:50:16,334 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-06 08:50:16,334 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:50:16,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 43 conjunts are in the unsatisfiable core [2021-05-06 08:50:16,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:50:18,496 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:18,497 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:18,499 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:18,499 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:18,541 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:18,542 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:18,544 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:18,544 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:18,560 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:18,562 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:18,573 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:18,575 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:23,428 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:23,429 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:23,444 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:23,462 INFO L134 CoverageAnalysis]: Checked inductivity of 794 backedges. 155 proven. 41 refuted. 0 times theorem prover too weak. 598 trivial. 0 not checked. [2021-05-06 08:50:23,462 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:50:23,462 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1288463177] [2021-05-06 08:50:23,462 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:50:23,462 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [476403377] [2021-05-06 08:50:23,463 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [476403377] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:50:23,463 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:50:23,463 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-05-06 08:50:23,463 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [357683121] [2021-05-06 08:50:23,463 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-06 08:50:23,464 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:50:23,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-06 08:50:23,464 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-05-06 08:50:23,464 INFO L87 Difference]: Start difference. First operand 335 states and 378 transitions. Second operand has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 11 states have internal predecessors, (36), 6 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 6 states have call predecessors, (16), 5 states have call successors, (16) [2021-05-06 08:50:35,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:50:35,310 INFO L93 Difference]: Finished difference Result 379 states and 440 transitions. [2021-05-06 08:50:35,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-06 08:50:35,311 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 11 states have internal predecessors, (36), 6 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 6 states have call predecessors, (16), 5 states have call successors, (16) Word has length 136 [2021-05-06 08:50:35,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:50:35,312 INFO L225 Difference]: With dead ends: 379 [2021-05-06 08:50:35,312 INFO L226 Difference]: Without dead ends: 379 [2021-05-06 08:50:35,313 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 122 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 6840.9ms TimeCoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-05-06 08:50:35,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 379 states. [2021-05-06 08:50:35,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 379 to 355. [2021-05-06 08:50:35,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 355 states, 241 states have (on average 1.1410788381742738) internal successors, (275), 249 states have internal predecessors, (275), 68 states have call successors, (68), 46 states have call predecessors, (68), 45 states have return successors, (65), 59 states have call predecessors, (65), 65 states have call successors, (65) [2021-05-06 08:50:35,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 355 states to 355 states and 408 transitions. [2021-05-06 08:50:35,321 INFO L78 Accepts]: Start accepts. Automaton has 355 states and 408 transitions. Word has length 136 [2021-05-06 08:50:35,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:50:35,321 INFO L480 AbstractCegarLoop]: Abstraction has 355 states and 408 transitions. [2021-05-06 08:50:35,321 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 11 states have internal predecessors, (36), 6 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 6 states have call predecessors, (16), 5 states have call successors, (16) [2021-05-06 08:50:35,322 INFO L276 IsEmpty]: Start isEmpty. Operand 355 states and 408 transitions. [2021-05-06 08:50:35,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2021-05-06 08:50:35,322 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:50:35,323 INFO L523 BasicCegarLoop]: trace histogram [20, 19, 19, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:50:35,528 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-05-06 08:50:35,529 INFO L428 AbstractCegarLoop]: === Iteration 36 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:50:35,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:50:35,530 INFO L82 PathProgramCache]: Analyzing trace with hash 1344773984, now seen corresponding path program 2 times [2021-05-06 08:50:35,530 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:50:35,530 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [48153079] [2021-05-06 08:50:35,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:50:35,534 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:50:35,534 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [935908641] [2021-05-06 08:50:35,534 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:50:35,597 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 08:50:35,597 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:50:35,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 356 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-06 08:50:35,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:50:35,719 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:35,720 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:35,728 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:35,728 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:35,730 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:35,730 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:35,738 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:35,739 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:35,740 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:35,741 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:35,749 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:35,749 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:35,750 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:35,751 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:35,771 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:35,772 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:35,781 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:35,783 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:35,791 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:35,793 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:35,799 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:35,805 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:35,819 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:35,821 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:35,826 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:35,829 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:35,834 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:35,841 WARN L159 QuantifierPusher]: Ignoring assumption.