/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/egcd3-ll.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 19:16:36,354 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 19:16:36,355 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 19:16:36,375 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-02 19:16:36,381 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-02 19:16:36,382 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-02 19:16:36,382 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-02 19:16:36,383 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-02 19:16:36,383 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-02 19:16:36,384 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-02 19:16:36,385 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-02 19:16:36,386 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-02 19:16:36,387 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-02 19:16:36,388 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-02 19:16:36,388 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-02 19:16:36,389 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-02 19:16:36,390 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-02 19:16:36,395 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 19:16:36,396 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 19:16:36,396 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 19:16:36,397 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2021-05-02 19:16:36,410 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 19:16:36,411 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 19:16:36,413 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 19:16:36,413 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 19:16:36,413 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 19:16:36,413 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 19:16:36,414 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 19:16:36,414 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 19:16:36,414 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 19:16:36,414 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 19:16:36,415 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 19:16:36,415 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 19:16:36,415 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 19:16:36,415 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 19:16:36,415 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 19:16:36,415 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 19:16:36,415 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-02 19:16:36,415 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 19:16:36,416 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 19:16:36,416 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 19:16:36,416 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-02 19:16:36,416 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-05-02 19:16:36,417 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 19:16:36,658 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 19:16:36,671 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 19:16:36,673 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 19:16:36,673 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 19:16:36,674 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 19:16:36,674 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench/egcd3-ll.c [2021-05-02 19:16:36,711 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1c8848cf0/9cd709ce6bff46dc895e068a6285444c/FLAGb709d99f7 [2021-05-02 19:16:37,007 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 19:16:37,007 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench/egcd3-ll.c [2021-05-02 19:16:37,012 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1c8848cf0/9cd709ce6bff46dc895e068a6285444c/FLAGb709d99f7 [2021-05-02 19:16:37,447 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1c8848cf0/9cd709ce6bff46dc895e068a6285444c [2021-05-02 19:16:37,449 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 19:16:37,450 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-05-02 19:16:37,451 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 19:16:37,451 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 19:16:37,463 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 19:16:37,463 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 07:16:37" (1/1) ... [2021-05-02 19:16:37,464 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4970902c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:16:37, skipping insertion in model container [2021-05-02 19:16:37,465 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 07:16:37" (1/1) ... [2021-05-02 19:16:37,469 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 19:16:37,481 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 19:16:37,594 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/egcd3-ll.c[490,503] [2021-05-02 19:16:37,619 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 19:16:37,627 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 19:16:37,635 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/egcd3-ll.c[490,503] [2021-05-02 19:16:37,653 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 19:16:37,670 INFO L208 MainTranslator]: Completed translation [2021-05-02 19:16:37,688 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:16:37 WrapperNode [2021-05-02 19:16:37,688 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 19:16:37,691 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 19:16:37,691 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 19:16:37,691 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 19:16:37,699 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:16:37" (1/1) ... [2021-05-02 19:16:37,700 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:16:37" (1/1) ... [2021-05-02 19:16:37,705 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:16:37" (1/1) ... [2021-05-02 19:16:37,705 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:16:37" (1/1) ... [2021-05-02 19:16:37,716 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:16:37" (1/1) ... [2021-05-02 19:16:37,722 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:16:37" (1/1) ... [2021-05-02 19:16:37,724 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:16:37" (1/1) ... [2021-05-02 19:16:37,725 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 19:16:37,726 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 19:16:37,726 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 19:16:37,726 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 19:16:37,727 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:16:37" (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 [2021-05-02 19:16:37,801 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 19:16:37,801 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 19:16:37,801 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 19:16:37,801 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-02 19:16:37,801 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 19:16:37,802 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 19:16:37,802 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 19:16:37,802 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 19:16:37,802 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 19:16:37,802 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 19:16:37,803 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-02 19:16:37,803 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-02 19:16:37,803 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 19:16:37,803 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 19:16:37,803 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 19:16:37,804 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 19:16:37,804 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 19:16:37,804 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 19:16:37,804 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 19:16:37,804 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 19:16:38,059 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 19:16:38,060 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2021-05-02 19:16:38,061 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 07:16:38 BoogieIcfgContainer [2021-05-02 19:16:38,061 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 19:16:38,061 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2021-05-02 19:16:38,061 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2021-05-02 19:16:38,062 INFO L275 PluginConnector]: IcfgTransformer initialized [2021-05-02 19:16:38,063 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 07:16:38" (1/1) ... [2021-05-02 19:16:38,075 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 02.05 07:16:38 BasicIcfg [2021-05-02 19:16:38,075 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2021-05-02 19:16:38,076 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 19:16:38,076 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 19:16:38,078 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 19:16:38,078 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 07:16:37" (1/4) ... [2021-05-02 19:16:38,078 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@620d49c0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 07:16:38, skipping insertion in model container [2021-05-02 19:16:38,078 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:16:37" (2/4) ... [2021-05-02 19:16:38,079 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@620d49c0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 07:16:38, skipping insertion in model container [2021-05-02 19:16:38,079 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 07:16:38" (3/4) ... [2021-05-02 19:16:38,079 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@620d49c0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 07:16:38, skipping insertion in model container [2021-05-02 19:16:38,079 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 02.05 07:16:38" (4/4) ... [2021-05-02 19:16:38,080 INFO L111 eAbstractionObserver]: Analyzing ICFG egcd3-ll.cJordan [2021-05-02 19:16:38,083 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2021-05-02 19:16:38,086 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 19:16:38,097 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 19:16:38,115 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 19:16:38,116 INFO L377 AbstractCegarLoop]: Hoare is false [2021-05-02 19:16:38,116 INFO L378 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2021-05-02 19:16:38,116 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 19:16:38,116 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 19:16:38,116 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 19:16:38,116 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 19:16:38,116 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 19:16:38,126 INFO L276 IsEmpty]: Start isEmpty. Operand has 37 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 23 states have internal predecessors, (34), 9 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-05-02 19:16:38,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-02 19:16:38,131 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:16:38,132 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 19:16:38,132 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:16:38,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:16:38,136 INFO L82 PathProgramCache]: Analyzing trace with hash -1332561126, now seen corresponding path program 1 times [2021-05-02 19:16:38,142 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:16:38,142 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1151457453] [2021-05-02 19:16:38,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:16:38,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:16:38,317 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 19:16:38,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:16:38,332 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-02 19:16:38,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:16:38,343 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-05-02 19:16:38,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:16:38,347 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 19:16:38,347 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:16:38,348 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1151457453] [2021-05-02 19:16:38,348 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1151457453] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 19:16:38,348 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 19:16:38,348 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-02 19:16:38,349 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2092787143] [2021-05-02 19:16:38,351 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-02 19:16:38,351 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:16:38,359 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-02 19:16:38,359 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 19:16:38,360 INFO L87 Difference]: Start difference. First operand has 37 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 23 states have internal predecessors, (34), 9 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 19:16:38,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:16:38,419 INFO L93 Difference]: Finished difference Result 37 states and 44 transitions. [2021-05-02 19:16:38,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-02 19:16:38,421 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 22 [2021-05-02 19:16:38,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:16:38,425 INFO L225 Difference]: With dead ends: 37 [2021-05-02 19:16:38,425 INFO L226 Difference]: Without dead ends: 32 [2021-05-02 19:16:38,426 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 43.5ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 19:16:38,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-05-02 19:16:38,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2021-05-02 19:16:38,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 20 states have internal predecessors, (23), 9 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-02 19:16:38,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 39 transitions. [2021-05-02 19:16:38,446 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 39 transitions. Word has length 22 [2021-05-02 19:16:38,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:16:38,447 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 39 transitions. [2021-05-02 19:16:38,447 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 19:16:38,447 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 39 transitions. [2021-05-02 19:16:38,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-02 19:16:38,448 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:16:38,448 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 19:16:38,448 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-02 19:16:38,448 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:16:38,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:16:38,449 INFO L82 PathProgramCache]: Analyzing trace with hash -1285593101, now seen corresponding path program 1 times [2021-05-02 19:16:38,449 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:16:38,449 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1850525651] [2021-05-02 19:16:38,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:16:38,460 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 19:16:38,461 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [765014307] [2021-05-02 19:16:38,461 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 [2021-05-02 19:16:38,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:16:38,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-02 19:16:38,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:16:38,648 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:38,682 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-02 19:16:38,682 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:16:38,682 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1850525651] [2021-05-02 19:16:38,682 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 19:16:38,682 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [765014307] [2021-05-02 19:16:38,682 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [765014307] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 19:16:38,683 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 19:16:38,683 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-02 19:16:38,683 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116038397] [2021-05-02 19:16:38,685 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 19:16:38,685 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:16:38,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 19:16:38,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-02 19:16:38,687 INFO L87 Difference]: Start difference. First operand 32 states and 39 transitions. Second operand has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-05-02 19:16:38,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:16:38,752 INFO L93 Difference]: Finished difference Result 44 states and 57 transitions. [2021-05-02 19:16:38,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-02 19:16:38,753 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 23 [2021-05-02 19:16:38,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:16:38,753 INFO L225 Difference]: With dead ends: 44 [2021-05-02 19:16:38,753 INFO L226 Difference]: Without dead ends: 44 [2021-05-02 19:16:38,754 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 31.8ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-05-02 19:16:38,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-05-02 19:16:38,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 34. [2021-05-02 19:16:38,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 21 states have (on average 1.1904761904761905) internal successors, (25), 22 states have internal predecessors, (25), 9 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-02 19:16:38,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 41 transitions. [2021-05-02 19:16:38,759 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 41 transitions. Word has length 23 [2021-05-02 19:16:38,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:16:38,759 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 41 transitions. [2021-05-02 19:16:38,759 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-05-02 19:16:38,759 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 41 transitions. [2021-05-02 19:16:38,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-02 19:16:38,760 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:16:38,760 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 19:16:38,960 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-02 19:16:38,961 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:16:38,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:16:38,961 INFO L82 PathProgramCache]: Analyzing trace with hash -1248058574, now seen corresponding path program 1 times [2021-05-02 19:16:38,962 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:16:38,962 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1743329020] [2021-05-02 19:16:38,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:16:38,974 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 19:16:38,974 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1103117089] [2021-05-02 19:16:38,974 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 [2021-05-02 19:16:39,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:16:39,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-02 19:16:39,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:16:39,057 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:39,058 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:39,113 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:39,115 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:39,136 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-02 19:16:39,136 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:16:39,136 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1743329020] [2021-05-02 19:16:39,136 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 19:16:39,137 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1103117089] [2021-05-02 19:16:39,137 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1103117089] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 19:16:39,137 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 19:16:39,137 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-02 19:16:39,137 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [829296495] [2021-05-02 19:16:39,138 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 19:16:39,138 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:16:39,138 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 19:16:39,138 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-02 19:16:39,139 INFO L87 Difference]: Start difference. First operand 34 states and 41 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 6 states have internal predecessors, (18), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 19:16:39,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:16:39,226 INFO L93 Difference]: Finished difference Result 48 states and 60 transitions. [2021-05-02 19:16:39,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 19:16:39,226 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 6 states have internal predecessors, (18), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 26 [2021-05-02 19:16:39,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:16:39,230 INFO L225 Difference]: With dead ends: 48 [2021-05-02 19:16:39,230 INFO L226 Difference]: Without dead ends: 48 [2021-05-02 19:16:39,230 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 37.0ms TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-05-02 19:16:39,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-05-02 19:16:39,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 47. [2021-05-02 19:16:39,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 29 states have (on average 1.206896551724138) internal successors, (35), 30 states have internal predecessors, (35), 13 states have call successors, (13), 5 states have call predecessors, (13), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2021-05-02 19:16:39,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 59 transitions. [2021-05-02 19:16:39,246 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 59 transitions. Word has length 26 [2021-05-02 19:16:39,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:16:39,247 INFO L480 AbstractCegarLoop]: Abstraction has 47 states and 59 transitions. [2021-05-02 19:16:39,247 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 6 states have internal predecessors, (18), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 19:16:39,247 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 59 transitions. [2021-05-02 19:16:39,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-02 19:16:39,248 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:16:39,248 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 19:16:39,452 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 19:16:39,453 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:16:39,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:16:39,453 INFO L82 PathProgramCache]: Analyzing trace with hash -2002833725, now seen corresponding path program 1 times [2021-05-02 19:16:39,453 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:16:39,454 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1453710241] [2021-05-02 19:16:39,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:16:39,462 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 19:16:39,462 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2130841903] [2021-05-02 19:16:39,463 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 [2021-05-02 19:16:39,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:16:39,509 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-02 19:16:39,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:16:39,538 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:39,540 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:39,555 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:39,567 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:39,579 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:39,594 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-02 19:16:39,594 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:16:39,594 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1453710241] [2021-05-02 19:16:39,594 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 19:16:39,594 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2130841903] [2021-05-02 19:16:39,594 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2130841903] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 19:16:39,594 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 19:16:39,594 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-02 19:16:39,594 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1719349084] [2021-05-02 19:16:39,595 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 19:16:39,595 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:16:39,595 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 19:16:39,595 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-05-02 19:16:39,595 INFO L87 Difference]: Start difference. First operand 47 states and 59 transitions. Second operand has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 19:16:39,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:16:39,739 INFO L93 Difference]: Finished difference Result 93 states and 131 transitions. [2021-05-02 19:16:39,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 19:16:39,740 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 28 [2021-05-02 19:16:39,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:16:39,741 INFO L225 Difference]: With dead ends: 93 [2021-05-02 19:16:39,741 INFO L226 Difference]: Without dead ends: 93 [2021-05-02 19:16:39,741 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 68.5ms TimeCoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-05-02 19:16:39,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2021-05-02 19:16:39,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 68. [2021-05-02 19:16:39,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 46 states have (on average 1.2608695652173914) internal successors, (58), 47 states have internal predecessors, (58), 17 states have call successors, (17), 5 states have call predecessors, (17), 4 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2021-05-02 19:16:39,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 90 transitions. [2021-05-02 19:16:39,748 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 90 transitions. Word has length 28 [2021-05-02 19:16:39,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:16:39,748 INFO L480 AbstractCegarLoop]: Abstraction has 68 states and 90 transitions. [2021-05-02 19:16:39,748 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 19:16:39,748 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 90 transitions. [2021-05-02 19:16:39,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-05-02 19:16:39,749 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:16:39,749 INFO L523 BasicCegarLoop]: trace histogram [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] [2021-05-02 19:16:39,964 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 19:16:39,964 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:16:39,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:16:39,965 INFO L82 PathProgramCache]: Analyzing trace with hash -1141865733, now seen corresponding path program 1 times [2021-05-02 19:16:39,965 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:16:39,965 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [270058845] [2021-05-02 19:16:39,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:16:39,977 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 19:16:39,977 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1864438246] [2021-05-02 19:16:39,977 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 [2021-05-02 19:16:40,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:16:40,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 22 conjunts are in the unsatisfiable core [2021-05-02 19:16:40,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:16:40,057 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:40,059 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:40,100 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:40,102 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:40,106 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:40,107 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:40,123 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:40,124 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:40,129 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:40,130 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:40,150 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 19:16:40,155 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:16:40,156 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [270058845] [2021-05-02 19:16:40,156 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 19:16:40,156 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1864438246] [2021-05-02 19:16:40,156 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1864438246] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 19:16:40,156 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 19:16:40,156 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-05-02 19:16:40,156 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1564261446] [2021-05-02 19:16:40,157 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 19:16:40,157 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:16:40,158 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 19:16:40,158 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-05-02 19:16:40,158 INFO L87 Difference]: Start difference. First operand 68 states and 90 transitions. Second operand has 9 states, 8 states have (on average 2.25) internal successors, (18), 6 states have internal predecessors, (18), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-02 19:16:40,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:16:40,229 INFO L93 Difference]: Finished difference Result 74 states and 95 transitions. [2021-05-02 19:16:40,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 19:16:40,229 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.25) internal successors, (18), 6 states have internal predecessors, (18), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 31 [2021-05-02 19:16:40,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:16:40,230 INFO L225 Difference]: With dead ends: 74 [2021-05-02 19:16:40,230 INFO L226 Difference]: Without dead ends: 74 [2021-05-02 19:16:40,230 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 44.0ms TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-05-02 19:16:40,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-05-02 19:16:40,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 72. [2021-05-02 19:16:40,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 49 states have (on average 1.2448979591836735) internal successors, (61), 50 states have internal predecessors, (61), 17 states have call successors, (17), 6 states have call predecessors, (17), 5 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2021-05-02 19:16:40,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 93 transitions. [2021-05-02 19:16:40,235 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 93 transitions. Word has length 31 [2021-05-02 19:16:40,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:16:40,235 INFO L480 AbstractCegarLoop]: Abstraction has 72 states and 93 transitions. [2021-05-02 19:16:40,235 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 8 states have (on average 2.25) internal successors, (18), 6 states have internal predecessors, (18), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-02 19:16:40,235 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 93 transitions. [2021-05-02 19:16:40,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-05-02 19:16:40,235 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:16:40,235 INFO L523 BasicCegarLoop]: trace histogram [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] [2021-05-02 19:16:40,453 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 19:16:40,455 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:16:40,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:16:40,456 INFO L82 PathProgramCache]: Analyzing trace with hash -1101190558, now seen corresponding path program 1 times [2021-05-02 19:16:40,456 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:16:40,456 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1220908896] [2021-05-02 19:16:40,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:16:40,468 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 19:16:40,468 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1540615391] [2021-05-02 19:16:40,468 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 [2021-05-02 19:16:40,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:16:40,509 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-02 19:16:40,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:16:40,534 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:40,536 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:40,590 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:40,591 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:40,605 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-02 19:16:40,606 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:16:40,606 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1220908896] [2021-05-02 19:16:40,606 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 19:16:40,606 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1540615391] [2021-05-02 19:16:40,606 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1540615391] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 19:16:40,606 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 19:16:40,606 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-02 19:16:40,606 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1777803164] [2021-05-02 19:16:40,606 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 19:16:40,606 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:16:40,607 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 19:16:40,607 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-05-02 19:16:40,607 INFO L87 Difference]: Start difference. First operand 72 states and 93 transitions. Second operand has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 7 states have internal predecessors, (23), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 19:16:40,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:16:40,706 INFO L93 Difference]: Finished difference Result 106 states and 140 transitions. [2021-05-02 19:16:40,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 19:16:40,707 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 7 states have internal predecessors, (23), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 31 [2021-05-02 19:16:40,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:16:40,709 INFO L225 Difference]: With dead ends: 106 [2021-05-02 19:16:40,709 INFO L226 Difference]: Without dead ends: 106 [2021-05-02 19:16:40,709 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 40.2ms TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-05-02 19:16:40,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2021-05-02 19:16:40,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 102. [2021-05-02 19:16:40,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 70 states have (on average 1.2571428571428571) internal successors, (88), 71 states have internal predecessors, (88), 25 states have call successors, (25), 7 states have call predecessors, (25), 6 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) [2021-05-02 19:16:40,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 136 transitions. [2021-05-02 19:16:40,728 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 136 transitions. Word has length 31 [2021-05-02 19:16:40,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:16:40,729 INFO L480 AbstractCegarLoop]: Abstraction has 102 states and 136 transitions. [2021-05-02 19:16:40,729 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 7 states have internal predecessors, (23), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 19:16:40,729 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 136 transitions. [2021-05-02 19:16:40,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-02 19:16:40,731 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:16:40,731 INFO L523 BasicCegarLoop]: trace histogram [3, 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] [2021-05-02 19:16:40,940 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-05-02 19:16:40,941 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:16:40,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:16:40,941 INFO L82 PathProgramCache]: Analyzing trace with hash -41147214, now seen corresponding path program 1 times [2021-05-02 19:16:40,941 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:16:40,941 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1879032538] [2021-05-02 19:16:40,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:16:40,949 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 19:16:40,950 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [240629519] [2021-05-02 19:16:40,950 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 [2021-05-02 19:16:40,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:16:40,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-02 19:16:40,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:16:41,014 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:41,028 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:41,053 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:41,054 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:41,061 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:41,062 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:41,083 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:41,084 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:41,102 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-05-02 19:16:41,102 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:16:41,102 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1879032538] [2021-05-02 19:16:41,102 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 19:16:41,102 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [240629519] [2021-05-02 19:16:41,102 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [240629519] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 19:16:41,102 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 19:16:41,102 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-05-02 19:16:41,102 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1102025567] [2021-05-02 19:16:41,103 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 19:16:41,103 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:16:41,103 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 19:16:41,103 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-05-02 19:16:41,103 INFO L87 Difference]: Start difference. First operand 102 states and 136 transitions. Second operand has 9 states, 9 states have (on average 2.0) internal successors, (18), 7 states have internal predecessors, (18), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-02 19:16:41,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:16:41,200 INFO L93 Difference]: Finished difference Result 113 states and 151 transitions. [2021-05-02 19:16:41,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 19:16:41,207 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), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 36 [2021-05-02 19:16:41,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:16:41,207 INFO L225 Difference]: With dead ends: 113 [2021-05-02 19:16:41,207 INFO L226 Difference]: Without dead ends: 113 [2021-05-02 19:16:41,208 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 47.8ms TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-05-02 19:16:41,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2021-05-02 19:16:41,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 112. [2021-05-02 19:16:41,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 75 states have (on average 1.2533333333333334) internal successors, (94), 76 states have internal predecessors, (94), 29 states have call successors, (29), 8 states have call predecessors, (29), 7 states have return successors, (27), 27 states have call predecessors, (27), 27 states have call successors, (27) [2021-05-02 19:16:41,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 150 transitions. [2021-05-02 19:16:41,212 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 150 transitions. Word has length 36 [2021-05-02 19:16:41,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:16:41,212 INFO L480 AbstractCegarLoop]: Abstraction has 112 states and 150 transitions. [2021-05-02 19:16:41,213 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), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-02 19:16:41,213 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 150 transitions. [2021-05-02 19:16:41,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-02 19:16:41,213 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:16:41,213 INFO L523 BasicCegarLoop]: trace histogram [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] [2021-05-02 19:16:41,420 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 19:16:41,421 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:16:41,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:16:41,421 INFO L82 PathProgramCache]: Analyzing trace with hash 1201961419, now seen corresponding path program 1 times [2021-05-02 19:16:41,421 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:16:41,421 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1068388405] [2021-05-02 19:16:41,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:16:41,429 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 19:16:41,429 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1681357493] [2021-05-02 19:16:41,429 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 [2021-05-02 19:16:41,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:16:41,469 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 42 conjunts are in the unsatisfiable core [2021-05-02 19:16:41,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:16:41,496 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:41,497 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:41,592 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:41,593 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:41,596 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:41,597 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:41,608 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:41,608 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:41,610 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:41,611 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:41,626 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 19:16:41,627 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:16:41,627 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1068388405] [2021-05-02 19:16:41,627 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 19:16:41,627 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1681357493] [2021-05-02 19:16:41,627 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1681357493] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 19:16:41,627 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 19:16:41,627 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-02 19:16:41,627 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063732390] [2021-05-02 19:16:41,627 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-02 19:16:41,629 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:16:41,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-02 19:16:41,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-05-02 19:16:41,630 INFO L87 Difference]: Start difference. First operand 112 states and 150 transitions. Second operand has 11 states, 10 states have (on average 2.3) internal successors, (23), 8 states have internal predecessors, (23), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-02 19:16:41,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:16:41,786 INFO L93 Difference]: Finished difference Result 119 states and 156 transitions. [2021-05-02 19:16:41,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 19:16:41,786 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.3) internal successors, (23), 8 states have internal predecessors, (23), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 36 [2021-05-02 19:16:41,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:16:41,787 INFO L225 Difference]: With dead ends: 119 [2021-05-02 19:16:41,787 INFO L226 Difference]: Without dead ends: 119 [2021-05-02 19:16:41,788 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 87.0ms TimeCoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-05-02 19:16:41,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2021-05-02 19:16:41,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 116. [2021-05-02 19:16:41,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 78 states have (on average 1.2435897435897436) internal successors, (97), 79 states have internal predecessors, (97), 29 states have call successors, (29), 9 states have call predecessors, (29), 8 states have return successors, (27), 27 states have call predecessors, (27), 27 states have call successors, (27) [2021-05-02 19:16:41,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 153 transitions. [2021-05-02 19:16:41,797 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 153 transitions. Word has length 36 [2021-05-02 19:16:41,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:16:41,798 INFO L480 AbstractCegarLoop]: Abstraction has 116 states and 153 transitions. [2021-05-02 19:16:41,798 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 10 states have (on average 2.3) internal successors, (23), 8 states have internal predecessors, (23), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-02 19:16:41,798 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 153 transitions. [2021-05-02 19:16:41,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-02 19:16:41,802 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:16:41,802 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 19:16:42,017 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 19:16:42,017 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:16:42,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:16:42,017 INFO L82 PathProgramCache]: Analyzing trace with hash 1242636594, now seen corresponding path program 2 times [2021-05-02 19:16:42,017 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:16:42,018 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [468577917] [2021-05-02 19:16:42,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:16:42,028 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 19:16:42,028 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1137913373] [2021-05-02 19:16:42,028 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 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 [2021-05-02 19:16:42,078 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 19:16:42,078 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 19:16:42,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-02 19:16:42,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:16:42,112 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:42,114 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:42,115 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:42,123 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:42,147 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 19:16:42,148 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:16:42,148 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [468577917] [2021-05-02 19:16:42,148 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 19:16:42,148 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1137913373] [2021-05-02 19:16:42,148 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1137913373] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 19:16:42,148 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 19:16:42,148 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-02 19:16:42,148 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143844479] [2021-05-02 19:16:42,148 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-02 19:16:42,148 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:16:42,149 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-02 19:16:42,149 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-02 19:16:42,149 INFO L87 Difference]: Start difference. First operand 116 states and 153 transitions. Second operand has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-05-02 19:16:42,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:16:42,200 INFO L93 Difference]: Finished difference Result 127 states and 170 transitions. [2021-05-02 19:16:42,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-02 19:16:42,200 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 36 [2021-05-02 19:16:42,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:16:42,201 INFO L225 Difference]: With dead ends: 127 [2021-05-02 19:16:42,201 INFO L226 Difference]: Without dead ends: 127 [2021-05-02 19:16:42,201 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 16.8ms TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-05-02 19:16:42,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2021-05-02 19:16:42,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 101. [2021-05-02 19:16:42,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 67 states have (on average 1.1940298507462686) internal successors, (80), 68 states have internal predecessors, (80), 25 states have call successors, (25), 9 states have call predecessors, (25), 8 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) [2021-05-02 19:16:42,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 128 transitions. [2021-05-02 19:16:42,205 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 128 transitions. Word has length 36 [2021-05-02 19:16:42,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:16:42,205 INFO L480 AbstractCegarLoop]: Abstraction has 101 states and 128 transitions. [2021-05-02 19:16:42,205 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-05-02 19:16:42,205 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 128 transitions. [2021-05-02 19:16:42,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-05-02 19:16:42,206 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:16:42,206 INFO L523 BasicCegarLoop]: trace histogram [4, 3, 3, 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] [2021-05-02 19:16:42,412 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-05-02 19:16:42,413 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:16:42,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:16:42,413 INFO L82 PathProgramCache]: Analyzing trace with hash 2036500795, now seen corresponding path program 1 times [2021-05-02 19:16:42,413 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:16:42,413 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1063623675] [2021-05-02 19:16:42,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:16:42,420 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 19:16:42,420 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1050566571] [2021-05-02 19:16:42,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2021-05-02 19:16:42,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:16:42,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-02 19:16:42,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:16:42,477 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:42,531 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-05-02 19:16:42,531 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:16:42,531 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1063623675] [2021-05-02 19:16:42,531 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 19:16:42,532 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1050566571] [2021-05-02 19:16:42,532 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1050566571] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 19:16:42,532 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 19:16:42,532 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-02 19:16:42,532 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2062032982] [2021-05-02 19:16:42,532 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-02 19:16:42,532 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:16:42,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-02 19:16:42,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-05-02 19:16:42,533 INFO L87 Difference]: Start difference. First operand 101 states and 128 transitions. Second operand has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-05-02 19:16:42,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:16:42,600 INFO L93 Difference]: Finished difference Result 149 states and 204 transitions. [2021-05-02 19:16:42,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 19:16:42,600 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), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 41 [2021-05-02 19:16:42,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:16:42,601 INFO L225 Difference]: With dead ends: 149 [2021-05-02 19:16:42,601 INFO L226 Difference]: Without dead ends: 149 [2021-05-02 19:16:42,601 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 23.4ms TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-05-02 19:16:42,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2021-05-02 19:16:42,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 130. [2021-05-02 19:16:42,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 75 states have (on average 1.1733333333333333) internal successors, (88), 81 states have internal predecessors, (88), 45 states have call successors, (45), 10 states have call predecessors, (45), 9 states have return successors, (43), 38 states have call predecessors, (43), 43 states have call successors, (43) [2021-05-02 19:16:42,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 176 transitions. [2021-05-02 19:16:42,606 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 176 transitions. Word has length 41 [2021-05-02 19:16:42,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:16:42,606 INFO L480 AbstractCegarLoop]: Abstraction has 130 states and 176 transitions. [2021-05-02 19:16:42,606 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), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-05-02 19:16:42,607 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 176 transitions. [2021-05-02 19:16:42,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-05-02 19:16:42,607 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:16:42,607 INFO L523 BasicCegarLoop]: trace histogram [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, 1, 1] [2021-05-02 19:16:42,814 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 19:16:42,814 INFO L428 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:16:42,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:16:42,814 INFO L82 PathProgramCache]: Analyzing trace with hash -187568158, now seen corresponding path program 1 times [2021-05-02 19:16:42,815 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:16:42,815 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1439731633] [2021-05-02 19:16:42,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:16:42,821 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 19:16:42,821 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1420771801] [2021-05-02 19:16:42,821 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 [2021-05-02 19:16:42,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:16:42,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 18 conjunts are in the unsatisfiable core [2021-05-02 19:16:42,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:16:42,877 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:42,878 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:42,885 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:42,891 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:42,900 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:42,926 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:42,927 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:42,938 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:42,938 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:42,945 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:42,946 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:42,960 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-05-02 19:16:42,960 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:16:42,960 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1439731633] [2021-05-02 19:16:42,960 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 19:16:42,960 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1420771801] [2021-05-02 19:16:42,960 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1420771801] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 19:16:42,960 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 19:16:42,960 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-02 19:16:42,960 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1288456141] [2021-05-02 19:16:42,961 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-02 19:16:42,961 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:16:42,961 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-02 19:16:42,961 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2021-05-02 19:16:42,961 INFO L87 Difference]: Start difference. First operand 130 states and 176 transitions. Second operand has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 9 states have internal predecessors, (26), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-05-02 19:16:43,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:16:43,184 INFO L93 Difference]: Finished difference Result 180 states and 254 transitions. [2021-05-02 19:16:43,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-02 19:16:43,184 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 9 states have internal predecessors, (26), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 41 [2021-05-02 19:16:43,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:16:43,187 INFO L225 Difference]: With dead ends: 180 [2021-05-02 19:16:43,187 INFO L226 Difference]: Without dead ends: 180 [2021-05-02 19:16:43,187 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 100.2ms TimeCoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2021-05-02 19:16:43,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2021-05-02 19:16:43,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 145. [2021-05-02 19:16:43,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 81 states have (on average 1.1728395061728396) internal successors, (95), 88 states have internal predecessors, (95), 53 states have call successors, (53), 11 states have call predecessors, (53), 10 states have return successors, (51), 45 states have call predecessors, (51), 51 states have call successors, (51) [2021-05-02 19:16:43,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 199 transitions. [2021-05-02 19:16:43,200 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 199 transitions. Word has length 41 [2021-05-02 19:16:43,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:16:43,200 INFO L480 AbstractCegarLoop]: Abstraction has 145 states and 199 transitions. [2021-05-02 19:16:43,200 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 9 states have internal predecessors, (26), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-05-02 19:16:43,201 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 199 transitions. [2021-05-02 19:16:43,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-05-02 19:16:43,201 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:16:43,201 INFO L523 BasicCegarLoop]: trace histogram [5, 4, 4, 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, 1, 1, 1, 1, 1] [2021-05-02 19:16:43,418 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 19:16:43,419 INFO L428 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:16:43,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:16:43,419 INFO L82 PathProgramCache]: Analyzing trace with hash -379845647, now seen corresponding path program 1 times [2021-05-02 19:16:43,419 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:16:43,419 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [687408748] [2021-05-02 19:16:43,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:16:43,431 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 19:16:43,432 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [141605545] [2021-05-02 19:16:43,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2021-05-02 19:16:43,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:16:43,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 62 conjunts are in the unsatisfiable core [2021-05-02 19:16:43,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:16:43,490 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:43,491 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:43,549 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:43,555 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:43,563 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:43,564 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:43,588 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:43,590 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:43,598 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:43,600 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:43,752 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:43,754 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:43,777 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 10 proven. 14 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-05-02 19:16:43,777 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:16:43,778 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [687408748] [2021-05-02 19:16:43,778 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 19:16:43,778 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [141605545] [2021-05-02 19:16:43,778 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [141605545] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 19:16:43,778 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 19:16:43,778 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2021-05-02 19:16:43,778 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [694114313] [2021-05-02 19:16:43,778 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-02 19:16:43,778 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:16:43,779 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-02 19:16:43,779 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-05-02 19:16:43,779 INFO L87 Difference]: Start difference. First operand 145 states and 199 transitions. Second operand has 16 states, 15 states have (on average 2.066666666666667) internal successors, (31), 14 states have internal predecessors, (31), 4 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-02 19:16:44,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:16:44,215 INFO L93 Difference]: Finished difference Result 183 states and 246 transitions. [2021-05-02 19:16:44,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-02 19:16:44,215 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.066666666666667) internal successors, (31), 14 states have internal predecessors, (31), 4 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 53 [2021-05-02 19:16:44,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:16:44,218 INFO L225 Difference]: With dead ends: 183 [2021-05-02 19:16:44,218 INFO L226 Difference]: Without dead ends: 182 [2021-05-02 19:16:44,219 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 349.9ms TimeCoverageRelationStatistics Valid=86, Invalid=466, Unknown=0, NotChecked=0, Total=552 [2021-05-02 19:16:44,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2021-05-02 19:16:44,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 180. [2021-05-02 19:16:44,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 105 states have (on average 1.161904761904762) internal successors, (122), 112 states have internal predecessors, (122), 61 states have call successors, (61), 14 states have call predecessors, (61), 13 states have return successors, (59), 53 states have call predecessors, (59), 59 states have call successors, (59) [2021-05-02 19:16:44,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 242 transitions. [2021-05-02 19:16:44,228 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 242 transitions. Word has length 53 [2021-05-02 19:16:44,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:16:44,228 INFO L480 AbstractCegarLoop]: Abstraction has 180 states and 242 transitions. [2021-05-02 19:16:44,229 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 15 states have (on average 2.066666666666667) internal successors, (31), 14 states have internal predecessors, (31), 4 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-02 19:16:44,229 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 242 transitions. [2021-05-02 19:16:44,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-05-02 19:16:44,230 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:16:44,230 INFO L523 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 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, 1, 1] [2021-05-02 19:16:44,436 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-05-02 19:16:44,437 INFO L428 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:16:44,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:16:44,437 INFO L82 PathProgramCache]: Analyzing trace with hash 1314913985, now seen corresponding path program 2 times [2021-05-02 19:16:44,437 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:16:44,437 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1830354516] [2021-05-02 19:16:44,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:16:44,443 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 19:16:44,443 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2076963385] [2021-05-02 19:16:44,444 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 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 [2021-05-02 19:16:44,484 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 19:16:44,485 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 19:16:44,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 8 conjunts are in the unsatisfiable core [2021-05-02 19:16:44,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:16:44,512 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:44,513 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:44,514 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:44,520 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:44,528 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:44,537 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:44,538 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:44,545 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:44,546 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:44,552 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:44,553 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:44,560 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:44,560 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:44,568 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:44,569 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:44,578 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:44,589 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 16 proven. 5 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-05-02 19:16:44,589 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:16:44,589 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1830354516] [2021-05-02 19:16:44,589 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 19:16:44,589 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2076963385] [2021-05-02 19:16:44,589 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2076963385] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 19:16:44,590 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 19:16:44,590 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-02 19:16:44,590 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149071599] [2021-05-02 19:16:44,590 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 19:16:44,590 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:16:44,590 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 19:16:44,590 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-05-02 19:16:44,591 INFO L87 Difference]: Start difference. First operand 180 states and 242 transitions. Second operand has 8 states, 8 states have (on average 3.75) internal successors, (30), 8 states have internal predecessors, (30), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-05-02 19:16:44,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:16:44,811 INFO L93 Difference]: Finished difference Result 317 states and 471 transitions. [2021-05-02 19:16:44,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-02 19:16:44,811 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.75) internal successors, (30), 8 states have internal predecessors, (30), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 58 [2021-05-02 19:16:44,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:16:44,813 INFO L225 Difference]: With dead ends: 317 [2021-05-02 19:16:44,813 INFO L226 Difference]: Without dead ends: 317 [2021-05-02 19:16:44,814 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 99.5ms TimeCoverageRelationStatistics Valid=93, Invalid=249, Unknown=0, NotChecked=0, Total=342 [2021-05-02 19:16:44,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 317 states. [2021-05-02 19:16:44,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 317 to 214. [2021-05-02 19:16:44,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 214 states, 127 states have (on average 1.1968503937007875) internal successors, (152), 133 states have internal predecessors, (152), 73 states have call successors, (73), 14 states have call predecessors, (73), 13 states have return successors, (71), 66 states have call predecessors, (71), 71 states have call successors, (71) [2021-05-02 19:16:44,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 296 transitions. [2021-05-02 19:16:44,822 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 296 transitions. Word has length 58 [2021-05-02 19:16:44,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:16:44,822 INFO L480 AbstractCegarLoop]: Abstraction has 214 states and 296 transitions. [2021-05-02 19:16:44,822 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.75) internal successors, (30), 8 states have internal predecessors, (30), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-05-02 19:16:44,822 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 296 transitions. [2021-05-02 19:16:44,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-05-02 19:16:44,823 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:16:44,823 INFO L523 BasicCegarLoop]: trace histogram [8, 7, 7, 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] [2021-05-02 19:16:45,040 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-05-02 19:16:45,040 INFO L428 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:16:45,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:16:45,041 INFO L82 PathProgramCache]: Analyzing trace with hash 1179170910, now seen corresponding path program 1 times [2021-05-02 19:16:45,041 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:16:45,041 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [816408405] [2021-05-02 19:16:45,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:16:45,057 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 19:16:45,057 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1818526800] [2021-05-02 19:16:45,057 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 [2021-05-02 19:16:45,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:16:45,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 28 conjunts are in the unsatisfiable core [2021-05-02 19:16:45,115 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:16:45,137 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:45,165 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:45,166 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:45,173 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:45,173 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:45,180 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:45,181 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:45,187 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:45,187 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:45,206 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:45,206 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:45,213 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:45,214 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:45,220 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:45,221 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:45,227 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:45,229 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:45,242 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 14 proven. 5 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2021-05-02 19:16:45,243 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:16:45,243 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [816408405] [2021-05-02 19:16:45,243 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 19:16:45,243 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1818526800] [2021-05-02 19:16:45,243 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1818526800] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 19:16:45,243 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 19:16:45,243 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-02 19:16:45,243 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332616533] [2021-05-02 19:16:45,243 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 19:16:45,243 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:16:45,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 19:16:45,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-05-02 19:16:45,244 INFO L87 Difference]: Start difference. First operand 214 states and 296 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 8 states have internal predecessors, (20), 3 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 4 states have call predecessors, (10), 3 states have call successors, (10) [2021-05-02 19:16:45,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:16:45,394 INFO L93 Difference]: Finished difference Result 243 states and 336 transitions. [2021-05-02 19:16:45,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-02 19:16:45,394 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 8 states have internal predecessors, (20), 3 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 4 states have call predecessors, (10), 3 states have call successors, (10) Word has length 63 [2021-05-02 19:16:45,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:16:45,395 INFO L225 Difference]: With dead ends: 243 [2021-05-02 19:16:45,396 INFO L226 Difference]: Without dead ends: 243 [2021-05-02 19:16:45,396 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 62.4ms TimeCoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-05-02 19:16:45,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2021-05-02 19:16:45,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 233. [2021-05-02 19:16:45,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 233 states, 136 states have (on average 1.1911764705882353) internal successors, (162), 143 states have internal predecessors, (162), 81 states have call successors, (81), 16 states have call predecessors, (81), 15 states have return successors, (79), 73 states have call predecessors, (79), 79 states have call successors, (79) [2021-05-02 19:16:45,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 322 transitions. [2021-05-02 19:16:45,401 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 322 transitions. Word has length 63 [2021-05-02 19:16:45,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:16:45,402 INFO L480 AbstractCegarLoop]: Abstraction has 233 states and 322 transitions. [2021-05-02 19:16:45,402 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 8 states have internal predecessors, (20), 3 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 4 states have call predecessors, (10), 3 states have call successors, (10) [2021-05-02 19:16:45,402 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 322 transitions. [2021-05-02 19:16:45,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-05-02 19:16:45,402 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:16:45,402 INFO L523 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 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, 1, 1, 1, 1, 1] [2021-05-02 19:16:45,616 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-05-02 19:16:45,617 INFO L428 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:16:45,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:16:45,617 INFO L82 PathProgramCache]: Analyzing trace with hash 2133422500, now seen corresponding path program 1 times [2021-05-02 19:16:45,617 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:16:45,617 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [839738717] [2021-05-02 19:16:45,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:16:45,622 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 19:16:45,622 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1941211971] [2021-05-02 19:16:45,622 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 [2021-05-02 19:16:45,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:16:45,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 30 conjunts are in the unsatisfiable core [2021-05-02 19:16:45,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:16:45,709 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:45,710 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:45,723 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:45,743 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:45,745 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:45,766 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:45,798 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:45,800 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:45,808 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:45,809 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:45,871 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:45,876 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:45,893 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:45,896 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:45,907 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:45,996 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:45,999 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:46,042 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 12 proven. 29 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-05-02 19:16:46,042 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:16:46,042 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [839738717] [2021-05-02 19:16:46,042 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 19:16:46,042 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1941211971] [2021-05-02 19:16:46,042 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1941211971] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 19:16:46,042 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 19:16:46,042 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2021-05-02 19:16:46,042 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856532460] [2021-05-02 19:16:46,043 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-02 19:16:46,043 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:16:46,043 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-02 19:16:46,043 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-05-02 19:16:46,043 INFO L87 Difference]: Start difference. First operand 233 states and 322 transitions. Second operand has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 15 states have internal predecessors, (39), 5 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2021-05-02 19:16:47,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:16:47,448 INFO L93 Difference]: Finished difference Result 353 states and 505 transitions. [2021-05-02 19:16:47,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-05-02 19:16:47,448 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 15 states have internal predecessors, (39), 5 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) Word has length 61 [2021-05-02 19:16:47,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:16:47,450 INFO L225 Difference]: With dead ends: 353 [2021-05-02 19:16:47,450 INFO L226 Difference]: Without dead ends: 353 [2021-05-02 19:16:47,451 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 546 ImplicationChecksByTransitivity, 911.5ms TimeCoverageRelationStatistics Valid=418, Invalid=1934, Unknown=0, NotChecked=0, Total=2352 [2021-05-02 19:16:47,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 353 states. [2021-05-02 19:16:47,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 353 to 330. [2021-05-02 19:16:47,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 330 states, 190 states have (on average 1.2105263157894737) internal successors, (230), 202 states have internal predecessors, (230), 122 states have call successors, (122), 18 states have call predecessors, (122), 17 states have return successors, (120), 109 states have call predecessors, (120), 120 states have call successors, (120) [2021-05-02 19:16:47,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 330 states to 330 states and 472 transitions. [2021-05-02 19:16:47,460 INFO L78 Accepts]: Start accepts. Automaton has 330 states and 472 transitions. Word has length 61 [2021-05-02 19:16:47,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:16:47,460 INFO L480 AbstractCegarLoop]: Abstraction has 330 states and 472 transitions. [2021-05-02 19:16:47,460 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 15 states have internal predecessors, (39), 5 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2021-05-02 19:16:47,460 INFO L276 IsEmpty]: Start isEmpty. Operand 330 states and 472 transitions. [2021-05-02 19:16:47,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-05-02 19:16:47,461 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:16:47,461 INFO L523 BasicCegarLoop]: trace histogram [7, 6, 6, 3, 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] [2021-05-02 19:16:47,676 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 19:16:47,676 INFO L428 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:16:47,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:16:47,677 INFO L82 PathProgramCache]: Analyzing trace with hash 1962153648, now seen corresponding path program 2 times [2021-05-02 19:16:47,677 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:16:47,677 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [931481529] [2021-05-02 19:16:47,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:16:47,682 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 19:16:47,682 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [3349764] [2021-05-02 19:16:47,682 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 [2021-05-02 19:16:47,735 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 19:16:47,735 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 19:16:47,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 4 conjunts are in the unsatisfiable core [2021-05-02 19:16:47,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:16:47,768 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:47,769 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:47,774 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:47,775 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:47,780 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:47,781 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:47,787 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:47,788 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:47,800 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:47,801 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:47,802 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:47,821 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 48 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-05-02 19:16:47,822 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:16:47,822 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [931481529] [2021-05-02 19:16:47,822 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 19:16:47,822 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [3349764] [2021-05-02 19:16:47,822 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [3349764] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 19:16:47,822 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 19:16:47,822 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-02 19:16:47,822 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311417068] [2021-05-02 19:16:47,823 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-02 19:16:47,823 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:16:47,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-02 19:16:47,823 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-02 19:16:47,823 INFO L87 Difference]: Start difference. First operand 330 states and 472 transitions. Second operand has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-05-02 19:16:47,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:16:47,859 INFO L93 Difference]: Finished difference Result 323 states and 444 transitions. [2021-05-02 19:16:47,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-02 19:16:47,859 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 66 [2021-05-02 19:16:47,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:16:47,861 INFO L225 Difference]: With dead ends: 323 [2021-05-02 19:16:47,861 INFO L226 Difference]: Without dead ends: 323 [2021-05-02 19:16:47,861 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 14.0ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-02 19:16:47,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 323 states. [2021-05-02 19:16:47,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 323 to 296. [2021-05-02 19:16:47,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 296 states, 174 states have (on average 1.2011494252873562) internal successors, (209), 177 states have internal predecessors, (209), 105 states have call successors, (105), 17 states have call predecessors, (105), 16 states have return successors, (103), 101 states have call predecessors, (103), 103 states have call successors, (103) [2021-05-02 19:16:47,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 417 transitions. [2021-05-02 19:16:47,869 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 417 transitions. Word has length 66 [2021-05-02 19:16:47,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:16:47,869 INFO L480 AbstractCegarLoop]: Abstraction has 296 states and 417 transitions. [2021-05-02 19:16:47,869 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-05-02 19:16:47,869 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 417 transitions. [2021-05-02 19:16:47,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-05-02 19:16:47,869 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:16:47,869 INFO L523 BasicCegarLoop]: trace histogram [7, 6, 6, 3, 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] [2021-05-02 19:16:48,087 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-05-02 19:16:48,088 INFO L428 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:16:48,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:16:48,088 INFO L82 PathProgramCache]: Analyzing trace with hash -1003391628, now seen corresponding path program 3 times [2021-05-02 19:16:48,088 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:16:48,088 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [373033809] [2021-05-02 19:16:48,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:16:48,104 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 19:16:48,104 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1070903502] [2021-05-02 19:16:48,104 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 [2021-05-02 19:16:48,156 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-02 19:16:48,156 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 19:16:48,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-02 19:16:48,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:16:48,173 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:48,243 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 20 proven. 3 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2021-05-02 19:16:48,243 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:16:48,244 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [373033809] [2021-05-02 19:16:48,244 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 19:16:48,244 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1070903502] [2021-05-02 19:16:48,244 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1070903502] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 19:16:48,244 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 19:16:48,244 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-02 19:16:48,246 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [185103881] [2021-05-02 19:16:48,246 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-02 19:16:48,246 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:16:48,247 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-02 19:16:48,247 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-05-02 19:16:48,247 INFO L87 Difference]: Start difference. First operand 296 states and 417 transitions. Second operand has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 6 states have internal predecessors, (29), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-05-02 19:16:48,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:16:48,297 INFO L93 Difference]: Finished difference Result 337 states and 482 transitions. [2021-05-02 19:16:48,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 19:16:48,298 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 6 states have internal predecessors, (29), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 66 [2021-05-02 19:16:48,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:16:48,299 INFO L225 Difference]: With dead ends: 337 [2021-05-02 19:16:48,299 INFO L226 Difference]: Without dead ends: 337 [2021-05-02 19:16:48,299 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 23.8ms TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-05-02 19:16:48,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 337 states. [2021-05-02 19:16:48,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 337 to 330. [2021-05-02 19:16:48,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 330 states, 187 states have (on average 1.213903743315508) internal successors, (227), 190 states have internal predecessors, (227), 125 states have call successors, (125), 18 states have call predecessors, (125), 17 states have return successors, (123), 121 states have call predecessors, (123), 123 states have call successors, (123) [2021-05-02 19:16:48,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 330 states to 330 states and 475 transitions. [2021-05-02 19:16:48,308 INFO L78 Accepts]: Start accepts. Automaton has 330 states and 475 transitions. Word has length 66 [2021-05-02 19:16:48,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:16:48,308 INFO L480 AbstractCegarLoop]: Abstraction has 330 states and 475 transitions. [2021-05-02 19:16:48,308 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 6 states have internal predecessors, (29), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-05-02 19:16:48,308 INFO L276 IsEmpty]: Start isEmpty. Operand 330 states and 475 transitions. [2021-05-02 19:16:48,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-05-02 19:16:48,309 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:16:48,309 INFO L523 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 3, 3, 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] [2021-05-02 19:16:48,524 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-05-02 19:16:48,524 INFO L428 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:16:48,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:16:48,525 INFO L82 PathProgramCache]: Analyzing trace with hash -1089705015, now seen corresponding path program 4 times [2021-05-02 19:16:48,525 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:16:48,525 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1174147677] [2021-05-02 19:16:48,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:16:48,537 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 19:16:48,537 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1965659809] [2021-05-02 19:16:48,537 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 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 [2021-05-02 19:16:48,619 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 19:16:48,619 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 19:16:48,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 73 conjunts are in the unsatisfiable core [2021-05-02 19:16:48,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:16:48,640 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:48,640 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:48,765 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:48,769 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:48,851 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:48,919 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:48,931 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:49,088 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:49,090 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:49,102 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:49,105 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:49,130 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 8 proven. 45 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-05-02 19:16:49,130 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:16:49,130 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1174147677] [2021-05-02 19:16:49,130 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 19:16:49,130 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1965659809] [2021-05-02 19:16:49,131 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1965659809] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 19:16:49,131 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 19:16:49,131 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2021-05-02 19:16:49,131 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1237632882] [2021-05-02 19:16:49,132 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-05-02 19:16:49,132 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:16:49,132 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-05-02 19:16:49,132 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2021-05-02 19:16:49,132 INFO L87 Difference]: Start difference. First operand 330 states and 475 transitions. Second operand has 20 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 16 states have internal predecessors, (39), 6 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (8), 5 states have call predecessors, (8), 6 states have call successors, (8) [2021-05-02 19:16:49,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:16:49,731 INFO L93 Difference]: Finished difference Result 391 states and 554 transitions. [2021-05-02 19:16:49,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-02 19:16:49,732 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 16 states have internal predecessors, (39), 6 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (8), 5 states have call predecessors, (8), 6 states have call successors, (8) Word has length 66 [2021-05-02 19:16:49,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:16:49,733 INFO L225 Difference]: With dead ends: 391 [2021-05-02 19:16:49,733 INFO L226 Difference]: Without dead ends: 391 [2021-05-02 19:16:49,734 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 490.2ms TimeCoverageRelationStatistics Valid=98, Invalid=604, Unknown=0, NotChecked=0, Total=702 [2021-05-02 19:16:49,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 391 states. [2021-05-02 19:16:49,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 391 to 377. [2021-05-02 19:16:49,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 377 states, 215 states have (on average 1.2093023255813953) internal successors, (260), 218 states have internal predecessors, (260), 141 states have call successors, (141), 21 states have call predecessors, (141), 20 states have return successors, (139), 137 states have call predecessors, (139), 139 states have call successors, (139) [2021-05-02 19:16:49,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 377 states to 377 states and 540 transitions. [2021-05-02 19:16:49,743 INFO L78 Accepts]: Start accepts. Automaton has 377 states and 540 transitions. Word has length 66 [2021-05-02 19:16:49,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:16:49,744 INFO L480 AbstractCegarLoop]: Abstraction has 377 states and 540 transitions. [2021-05-02 19:16:49,744 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 16 states have internal predecessors, (39), 6 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (8), 5 states have call predecessors, (8), 6 states have call successors, (8) [2021-05-02 19:16:49,744 INFO L276 IsEmpty]: Start isEmpty. Operand 377 states and 540 transitions. [2021-05-02 19:16:49,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-05-02 19:16:49,745 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:16:49,745 INFO L523 BasicCegarLoop]: trace histogram [8, 7, 7, 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] [2021-05-02 19:16:49,956 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-05-02 19:16:49,957 INFO L428 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:16:49,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:16:49,957 INFO L82 PathProgramCache]: Analyzing trace with hash -739414226, now seen corresponding path program 1 times [2021-05-02 19:16:49,957 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:16:49,957 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1575502685] [2021-05-02 19:16:49,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:16:49,962 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 19:16:49,962 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [813160495] [2021-05-02 19:16:49,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2021-05-02 19:16:50,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:16:50,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-02 19:16:50,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:16:50,040 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:50,041 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:50,086 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:50,086 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:50,093 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:50,094 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:50,100 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:50,100 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:50,108 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:50,108 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:50,127 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:50,128 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:50,134 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:50,135 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:50,141 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:50,141 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:50,148 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:50,149 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:50,166 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 14 proven. 12 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2021-05-02 19:16:50,166 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:16:50,166 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1575502685] [2021-05-02 19:16:50,166 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 19:16:50,166 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [813160495] [2021-05-02 19:16:50,166 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [813160495] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 19:16:50,166 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 19:16:50,166 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-02 19:16:50,166 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2075615523] [2021-05-02 19:16:50,167 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-02 19:16:50,167 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:16:50,168 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-02 19:16:50,168 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-05-02 19:16:50,168 INFO L87 Difference]: Start difference. First operand 377 states and 540 transitions. Second operand has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 10 states have internal predecessors, (28), 4 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2021-05-02 19:16:50,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:16:50,435 INFO L93 Difference]: Finished difference Result 449 states and 643 transitions. [2021-05-02 19:16:50,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-02 19:16:50,435 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), 4 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) Word has length 68 [2021-05-02 19:16:50,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:16:50,437 INFO L225 Difference]: With dead ends: 449 [2021-05-02 19:16:50,437 INFO L226 Difference]: Without dead ends: 449 [2021-05-02 19:16:50,437 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 134.3ms TimeCoverageRelationStatistics Valid=96, Invalid=366, Unknown=0, NotChecked=0, Total=462 [2021-05-02 19:16:50,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 449 states. [2021-05-02 19:16:50,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 449 to 395. [2021-05-02 19:16:50,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 395 states, 223 states have (on average 1.201793721973094) internal successors, (268), 228 states have internal predecessors, (268), 149 states have call successors, (149), 23 states have call predecessors, (149), 22 states have return successors, (147), 143 states have call predecessors, (147), 147 states have call successors, (147) [2021-05-02 19:16:50,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 395 states to 395 states and 564 transitions. [2021-05-02 19:16:50,448 INFO L78 Accepts]: Start accepts. Automaton has 395 states and 564 transitions. Word has length 68 [2021-05-02 19:16:50,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:16:50,448 INFO L480 AbstractCegarLoop]: Abstraction has 395 states and 564 transitions. [2021-05-02 19:16:50,448 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), 4 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2021-05-02 19:16:50,448 INFO L276 IsEmpty]: Start isEmpty. Operand 395 states and 564 transitions. [2021-05-02 19:16:50,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-05-02 19:16:50,450 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:16:50,450 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 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, 1, 1] [2021-05-02 19:16:50,665 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 19:16:50,665 INFO L428 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:16:50,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:16:50,665 INFO L82 PathProgramCache]: Analyzing trace with hash 928880276, now seen corresponding path program 1 times [2021-05-02 19:16:50,665 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:16:50,665 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [224227059] [2021-05-02 19:16:50,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:16:50,671 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 19:16:50,671 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1289162434] [2021-05-02 19:16:50,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2021-05-02 19:16:50,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:16:50,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 78 conjunts are in the unsatisfiable core [2021-05-02 19:16:50,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:16:50,735 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:50,736 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:50,806 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:50,807 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:50,814 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:50,815 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:50,822 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:50,823 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:50,831 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:50,832 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:50,898 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:50,899 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:50,908 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:50,909 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:50,930 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:50,931 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:50,938 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:50,939 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:51,084 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:51,085 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:51,110 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 49 proven. 25 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-05-02 19:16:51,110 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:16:51,110 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [224227059] [2021-05-02 19:16:51,111 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 19:16:51,111 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1289162434] [2021-05-02 19:16:51,111 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1289162434] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 19:16:51,111 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 19:16:51,111 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2021-05-02 19:16:51,111 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1453206942] [2021-05-02 19:16:51,111 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-02 19:16:51,111 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:16:51,111 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-02 19:16:51,112 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-05-02 19:16:51,112 INFO L87 Difference]: Start difference. First operand 395 states and 564 transitions. Second operand has 17 states, 16 states have (on average 2.0625) internal successors, (33), 15 states have internal predecessors, (33), 5 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2021-05-02 19:16:51,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:16:51,677 INFO L93 Difference]: Finished difference Result 472 states and 676 transitions. [2021-05-02 19:16:51,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-02 19:16:51,677 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.0625) internal successors, (33), 15 states have internal predecessors, (33), 5 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) Word has length 75 [2021-05-02 19:16:51,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:16:51,679 INFO L225 Difference]: With dead ends: 472 [2021-05-02 19:16:51,679 INFO L226 Difference]: Without dead ends: 471 [2021-05-02 19:16:51,679 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 56 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 408.5ms TimeCoverageRelationStatistics Valid=94, Invalid=556, Unknown=0, NotChecked=0, Total=650 [2021-05-02 19:16:51,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 471 states. [2021-05-02 19:16:51,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 471 to 460. [2021-05-02 19:16:51,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 460 states, 257 states have (on average 1.2101167315175096) internal successors, (311), 262 states have internal predecessors, (311), 177 states have call successors, (177), 26 states have call predecessors, (177), 25 states have return successors, (175), 171 states have call predecessors, (175), 175 states have call successors, (175) [2021-05-02 19:16:51,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 460 states to 460 states and 663 transitions. [2021-05-02 19:16:51,691 INFO L78 Accepts]: Start accepts. Automaton has 460 states and 663 transitions. Word has length 75 [2021-05-02 19:16:51,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:16:51,691 INFO L480 AbstractCegarLoop]: Abstraction has 460 states and 663 transitions. [2021-05-02 19:16:51,691 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 16 states have (on average 2.0625) internal successors, (33), 15 states have internal predecessors, (33), 5 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2021-05-02 19:16:51,691 INFO L276 IsEmpty]: Start isEmpty. Operand 460 states and 663 transitions. [2021-05-02 19:16:51,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-05-02 19:16:51,692 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:16:51,692 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 3, 3, 2, 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] [2021-05-02 19:16:51,909 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 19:16:51,909 INFO L428 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:16:51,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:16:51,909 INFO L82 PathProgramCache]: Analyzing trace with hash 1612092772, now seen corresponding path program 2 times [2021-05-02 19:16:51,909 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:16:51,910 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1715623975] [2021-05-02 19:16:51,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:16:51,921 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 19:16:51,921 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2063583612] [2021-05-02 19:16:51,921 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 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 [2021-05-02 19:16:51,971 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 19:16:51,971 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 19:16:51,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 101 conjunts are in the unsatisfiable core [2021-05-02 19:16:51,974 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:16:51,993 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:51,994 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:52,112 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:52,113 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:52,121 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:52,122 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:52,129 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:52,130 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:52,138 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:52,138 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:52,203 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:52,204 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:52,256 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:52,302 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:52,312 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:52,528 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:52,531 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:52,537 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:52,540 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:52,549 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:52,554 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:52,609 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 51 proven. 35 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2021-05-02 19:16:52,610 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:16:52,610 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1715623975] [2021-05-02 19:16:52,610 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 19:16:52,610 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2063583612] [2021-05-02 19:16:52,610 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2063583612] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 19:16:52,610 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 19:16:52,610 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2021-05-02 19:16:52,610 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972760549] [2021-05-02 19:16:52,611 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-02 19:16:52,611 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:16:52,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-02 19:16:52,611 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=398, Unknown=0, NotChecked=0, Total=462 [2021-05-02 19:16:52,611 INFO L87 Difference]: Start difference. First operand 460 states and 663 transitions. Second operand has 22 states, 20 states have (on average 1.9) internal successors, (38), 19 states have internal predecessors, (38), 7 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (11), 5 states have call predecessors, (11), 6 states have call successors, (11) [2021-05-02 19:16:53,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:16:53,546 INFO L93 Difference]: Finished difference Result 542 states and 780 transitions. [2021-05-02 19:16:53,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-02 19:16:53,547 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 20 states have (on average 1.9) internal successors, (38), 19 states have internal predecessors, (38), 7 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (11), 5 states have call predecessors, (11), 6 states have call successors, (11) Word has length 80 [2021-05-02 19:16:53,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:16:53,548 INFO L225 Difference]: With dead ends: 542 [2021-05-02 19:16:53,549 INFO L226 Difference]: Without dead ends: 541 [2021-05-02 19:16:53,549 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 57 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 669.8ms TimeCoverageRelationStatistics Valid=116, Invalid=814, Unknown=0, NotChecked=0, Total=930 [2021-05-02 19:16:53,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 541 states. [2021-05-02 19:16:53,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 541 to 525. [2021-05-02 19:16:53,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 525 states, 291 states have (on average 1.2164948453608246) internal successors, (354), 296 states have internal predecessors, (354), 205 states have call successors, (205), 29 states have call predecessors, (205), 28 states have return successors, (203), 199 states have call predecessors, (203), 203 states have call successors, (203) [2021-05-02 19:16:53,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 525 states to 525 states and 762 transitions. [2021-05-02 19:16:53,561 INFO L78 Accepts]: Start accepts. Automaton has 525 states and 762 transitions. Word has length 80 [2021-05-02 19:16:53,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:16:53,561 INFO L480 AbstractCegarLoop]: Abstraction has 525 states and 762 transitions. [2021-05-02 19:16:53,561 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 20 states have (on average 1.9) internal successors, (38), 19 states have internal predecessors, (38), 7 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (11), 5 states have call predecessors, (11), 6 states have call successors, (11) [2021-05-02 19:16:53,561 INFO L276 IsEmpty]: Start isEmpty. Operand 525 states and 762 transitions. [2021-05-02 19:16:53,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-05-02 19:16:53,562 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:16:53,562 INFO L523 BasicCegarLoop]: trace histogram [12, 11, 11, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 19:16:53,776 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-05-02 19:16:53,777 INFO L428 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:16:53,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:16:53,777 INFO L82 PathProgramCache]: Analyzing trace with hash 43621185, now seen corresponding path program 2 times [2021-05-02 19:16:53,777 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:16:53,777 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [243091300] [2021-05-02 19:16:53,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:16:53,789 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 19:16:53,790 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1590665112] [2021-05-02 19:16:53,790 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 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 [2021-05-02 19:16:53,840 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 19:16:53,840 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 19:16:53,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 33 conjunts are in the unsatisfiable core [2021-05-02 19:16:53,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:16:53,856 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:53,866 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:53,885 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:53,886 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:53,898 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:53,898 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:53,905 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:53,906 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:53,912 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:53,916 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:53,975 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:53,976 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:53,983 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:53,984 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:53,992 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:53,993 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:54,000 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:54,000 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:54,023 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:54,024 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:54,030 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:54,031 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:54,038 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:54,038 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:54,044 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:54,045 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:54,064 INFO L134 CoverageAnalysis]: Checked inductivity of 262 backedges. 30 proven. 38 refuted. 0 times theorem prover too weak. 194 trivial. 0 not checked. [2021-05-02 19:16:54,064 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:16:54,064 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [243091300] [2021-05-02 19:16:54,064 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 19:16:54,064 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1590665112] [2021-05-02 19:16:54,064 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1590665112] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 19:16:54,064 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 19:16:54,064 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2021-05-02 19:16:54,065 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1206208753] [2021-05-02 19:16:54,065 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-02 19:16:54,065 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:16:54,065 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-02 19:16:54,065 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-05-02 19:16:54,065 INFO L87 Difference]: Start difference. First operand 525 states and 762 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 11 states have internal predecessors, (25), 4 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (14), 6 states have call predecessors, (14), 4 states have call successors, (14) [2021-05-02 19:16:54,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:16:54,379 INFO L93 Difference]: Finished difference Result 558 states and 813 transitions. [2021-05-02 19:16:54,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-02 19:16:54,380 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 11 states have internal predecessors, (25), 4 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (14), 6 states have call predecessors, (14), 4 states have call successors, (14) Word has length 85 [2021-05-02 19:16:54,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:16:54,382 INFO L225 Difference]: With dead ends: 558 [2021-05-02 19:16:54,382 INFO L226 Difference]: Without dead ends: 558 [2021-05-02 19:16:54,382 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 131.8ms TimeCoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2021-05-02 19:16:54,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 558 states. [2021-05-02 19:16:54,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 558 to 546. [2021-05-02 19:16:54,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 546 states, 299 states have (on average 1.2173913043478262) internal successors, (364), 305 states have internal predecessors, (364), 217 states have call successors, (217), 30 states have call predecessors, (217), 29 states have return successors, (215), 210 states have call predecessors, (215), 215 states have call successors, (215) [2021-05-02 19:16:54,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 546 states to 546 states and 796 transitions. [2021-05-02 19:16:54,394 INFO L78 Accepts]: Start accepts. Automaton has 546 states and 796 transitions. Word has length 85 [2021-05-02 19:16:54,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:16:54,394 INFO L480 AbstractCegarLoop]: Abstraction has 546 states and 796 transitions. [2021-05-02 19:16:54,394 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 11 states have internal predecessors, (25), 4 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (14), 6 states have call predecessors, (14), 4 states have call successors, (14) [2021-05-02 19:16:54,394 INFO L276 IsEmpty]: Start isEmpty. Operand 546 states and 796 transitions. [2021-05-02 19:16:54,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-05-02 19:16:54,395 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:16:54,395 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 5, 3, 3, 3, 3, 3, 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] [2021-05-02 19:16:54,608 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-05-02 19:16:54,609 INFO L428 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:16:54,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:16:54,609 INFO L82 PathProgramCache]: Analyzing trace with hash -1882162634, now seen corresponding path program 5 times [2021-05-02 19:16:54,609 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:16:54,609 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [544148091] [2021-05-02 19:16:54,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:16:54,614 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 19:16:54,614 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1631713527] [2021-05-02 19:16:54,614 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 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 [2021-05-02 19:16:54,666 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-05-02 19:16:54,666 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 19:16:54,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 40 conjunts are in the unsatisfiable core [2021-05-02 19:16:54,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:16:54,688 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:54,689 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:54,705 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:54,730 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:54,731 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:54,740 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:54,741 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:54,748 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:54,749 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:54,756 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:54,757 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:54,774 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:54,805 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:54,807 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:54,830 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:54,851 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:54,899 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:54,900 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:54,911 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:54,912 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:54,949 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:54,951 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:54,964 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:54,967 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:54,977 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:55,107 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:55,110 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:55,151 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 37 proven. 56 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2021-05-02 19:16:55,151 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:16:55,152 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [544148091] [2021-05-02 19:16:55,152 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 19:16:55,152 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1631713527] [2021-05-02 19:16:55,152 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1631713527] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 19:16:55,153 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 19:16:55,153 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2021-05-02 19:16:55,153 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2078039656] [2021-05-02 19:16:55,153 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-05-02 19:16:55,154 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:16:55,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-05-02 19:16:55,154 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=324, Unknown=0, NotChecked=0, Total=380 [2021-05-02 19:16:55,154 INFO L87 Difference]: Start difference. First operand 546 states and 796 transitions. Second operand has 20 states, 20 states have (on average 2.2) internal successors, (44), 17 states have internal predecessors, (44), 6 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) [2021-05-02 19:16:55,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:16:55,935 INFO L93 Difference]: Finished difference Result 599 states and 869 transitions. [2021-05-02 19:16:55,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-02 19:16:55,936 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.2) internal successors, (44), 17 states have internal predecessors, (44), 6 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) Word has length 86 [2021-05-02 19:16:55,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:16:55,938 INFO L225 Difference]: With dead ends: 599 [2021-05-02 19:16:55,938 INFO L226 Difference]: Without dead ends: 599 [2021-05-02 19:16:55,938 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 66 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 591.9ms TimeCoverageRelationStatistics Valid=139, Invalid=853, Unknown=0, NotChecked=0, Total=992 [2021-05-02 19:16:55,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 599 states. [2021-05-02 19:16:55,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 599 to 552. [2021-05-02 19:16:55,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 552 states, 305 states have (on average 1.2131147540983607) internal successors, (370), 311 states have internal predecessors, (370), 217 states have call successors, (217), 30 states have call predecessors, (217), 29 states have return successors, (215), 210 states have call predecessors, (215), 215 states have call successors, (215) [2021-05-02 19:16:55,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 552 states to 552 states and 802 transitions. [2021-05-02 19:16:55,951 INFO L78 Accepts]: Start accepts. Automaton has 552 states and 802 transitions. Word has length 86 [2021-05-02 19:16:55,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:16:55,951 INFO L480 AbstractCegarLoop]: Abstraction has 552 states and 802 transitions. [2021-05-02 19:16:55,951 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.2) internal successors, (44), 17 states have internal predecessors, (44), 6 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) [2021-05-02 19:16:55,951 INFO L276 IsEmpty]: Start isEmpty. Operand 552 states and 802 transitions. [2021-05-02 19:16:55,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-05-02 19:16:55,952 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:16:55,952 INFO L523 BasicCegarLoop]: trace histogram [12, 11, 11, 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] [2021-05-02 19:16:56,164 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 19:16:56,165 INFO L428 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:16:56,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:16:56,165 INFO L82 PathProgramCache]: Analyzing trace with hash -2004986351, now seen corresponding path program 2 times [2021-05-02 19:16:56,165 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:16:56,165 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [276684887] [2021-05-02 19:16:56,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:16:56,170 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 19:16:56,170 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1828795413] [2021-05-02 19:16:56,170 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 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 [2021-05-02 19:16:56,218 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 19:16:56,218 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 19:16:56,219 INFO L263 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-02 19:16:56,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:16:56,240 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:56,240 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:56,279 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:56,280 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:56,286 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:56,286 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:56,292 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:56,294 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:56,301 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:56,302 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:56,321 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:56,323 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:56,330 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:56,330 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:56,343 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:56,344 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:56,350 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:56,350 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:56,369 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:56,370 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:56,375 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:56,376 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:56,382 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:56,383 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:56,393 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:56,394 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:56,411 INFO L134 CoverageAnalysis]: Checked inductivity of 266 backedges. 22 proven. 23 refuted. 0 times theorem prover too weak. 221 trivial. 0 not checked. [2021-05-02 19:16:56,411 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:16:56,411 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [276684887] [2021-05-02 19:16:56,411 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 19:16:56,412 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1828795413] [2021-05-02 19:16:56,412 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1828795413] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 19:16:56,412 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 19:16:56,412 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-05-02 19:16:56,412 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [718517934] [2021-05-02 19:16:56,413 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-02 19:16:56,413 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:16:56,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-02 19:16:56,413 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2021-05-02 19:16:56,413 INFO L87 Difference]: Start difference. First operand 552 states and 802 transitions. Second operand has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 11 states have internal predecessors, (30), 5 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) [2021-05-02 19:16:56,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:16:56,764 INFO L93 Difference]: Finished difference Result 633 states and 923 transitions. [2021-05-02 19:16:56,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-02 19:16:56,765 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 11 states have internal predecessors, (30), 5 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) Word has length 90 [2021-05-02 19:16:56,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:16:56,767 INFO L225 Difference]: With dead ends: 633 [2021-05-02 19:16:56,767 INFO L226 Difference]: Without dead ends: 633 [2021-05-02 19:16:56,767 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 165.0ms TimeCoverageRelationStatistics Valid=119, Invalid=481, Unknown=0, NotChecked=0, Total=600 [2021-05-02 19:16:56,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 633 states. [2021-05-02 19:16:56,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 633 to 573. [2021-05-02 19:16:56,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 573 states, 313 states have (on average 1.2140575079872205) internal successors, (380), 320 states have internal predecessors, (380), 229 states have call successors, (229), 31 states have call predecessors, (229), 30 states have return successors, (227), 221 states have call predecessors, (227), 227 states have call successors, (227) [2021-05-02 19:16:56,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 573 states to 573 states and 836 transitions. [2021-05-02 19:16:56,779 INFO L78 Accepts]: Start accepts. Automaton has 573 states and 836 transitions. Word has length 90 [2021-05-02 19:16:56,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:16:56,780 INFO L480 AbstractCegarLoop]: Abstraction has 573 states and 836 transitions. [2021-05-02 19:16:56,780 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 11 states have internal predecessors, (30), 5 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) [2021-05-02 19:16:56,780 INFO L276 IsEmpty]: Start isEmpty. Operand 573 states and 836 transitions. [2021-05-02 19:16:56,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-05-02 19:16:56,781 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:16:56,781 INFO L523 BasicCegarLoop]: trace histogram [10, 9, 9, 5, 3, 3, 3, 3, 3, 3, 3, 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] [2021-05-02 19:16:56,996 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-05-02 19:16:56,996 INFO L428 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:16:56,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:16:56,996 INFO L82 PathProgramCache]: Analyzing trace with hash -1632768393, now seen corresponding path program 6 times [2021-05-02 19:16:56,997 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:16:56,997 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [9070304] [2021-05-02 19:16:56,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:16:57,002 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 19:16:57,002 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1732155253] [2021-05-02 19:16:57,002 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 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 [2021-05-02 19:16:57,053 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-05-02 19:16:57,053 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 19:16:57,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 83 conjunts are in the unsatisfiable core [2021-05-02 19:16:57,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:16:57,057 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:57,058 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:57,100 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:57,101 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:57,107 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:57,108 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:57,127 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:57,127 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:57,133 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:57,134 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:57,158 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:57,212 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:57,213 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:57,228 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:57,229 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:57,261 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:57,263 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:57,271 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:57,272 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:57,393 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:57,398 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:59,446 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:59,448 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:59,480 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 51 proven. 62 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2021-05-02 19:16:59,480 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:16:59,480 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [9070304] [2021-05-02 19:16:59,480 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 19:16:59,480 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1732155253] [2021-05-02 19:16:59,480 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1732155253] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 19:16:59,480 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 19:16:59,480 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2021-05-02 19:16:59,480 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169898398] [2021-05-02 19:16:59,481 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-02 19:16:59,481 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:16:59,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-02 19:16:59,481 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=290, Unknown=1, NotChecked=0, Total=342 [2021-05-02 19:16:59,481 INFO L87 Difference]: Start difference. First operand 573 states and 836 transitions. Second operand has 19 states, 18 states have (on average 2.388888888888889) internal successors, (43), 16 states have internal predecessors, (43), 6 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 6 states have call predecessors, (12), 5 states have call successors, (12) [2021-05-02 19:17:28,038 WARN L205 SmtUtils]: Spent 16.10 s on a formula simplification. DAG size of input: 36 DAG size of output: 31 [2021-05-02 19:17:28,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:17:28,289 INFO L93 Difference]: Finished difference Result 682 states and 983 transitions. [2021-05-02 19:17:28,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-02 19:17:28,290 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 2.388888888888889) internal successors, (43), 16 states have internal predecessors, (43), 6 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 6 states have call predecessors, (12), 5 states have call successors, (12) Word has length 91 [2021-05-02 19:17:28,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:17:28,292 INFO L225 Difference]: With dead ends: 682 [2021-05-02 19:17:28,292 INFO L226 Difference]: Without dead ends: 682 [2021-05-02 19:17:28,292 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 72 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 18517.6ms TimeCoverageRelationStatistics Valid=104, Invalid=651, Unknown=1, NotChecked=0, Total=756 [2021-05-02 19:17:28,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 682 states. [2021-05-02 19:17:28,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 682 to 653. [2021-05-02 19:17:28,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 653 states, 357 states have (on average 1.2156862745098038) internal successors, (434), 364 states have internal predecessors, (434), 261 states have call successors, (261), 35 states have call predecessors, (261), 34 states have return successors, (259), 253 states have call predecessors, (259), 259 states have call successors, (259) [2021-05-02 19:17:28,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 653 states to 653 states and 954 transitions. [2021-05-02 19:17:28,305 INFO L78 Accepts]: Start accepts. Automaton has 653 states and 954 transitions. Word has length 91 [2021-05-02 19:17:28,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:17:28,305 INFO L480 AbstractCegarLoop]: Abstraction has 653 states and 954 transitions. [2021-05-02 19:17:28,305 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 18 states have (on average 2.388888888888889) internal successors, (43), 16 states have internal predecessors, (43), 6 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 6 states have call predecessors, (12), 5 states have call successors, (12) [2021-05-02 19:17:28,305 INFO L276 IsEmpty]: Start isEmpty. Operand 653 states and 954 transitions. [2021-05-02 19:17:28,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-05-02 19:17:28,306 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:17:28,306 INFO L523 BasicCegarLoop]: trace histogram [12, 11, 11, 3, 3, 3, 3, 3, 3, 3, 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, 1] [2021-05-02 19:17:28,520 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 19:17:28,521 INFO L428 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:17:28,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:17:28,521 INFO L82 PathProgramCache]: Analyzing trace with hash 1362689628, now seen corresponding path program 1 times [2021-05-02 19:17:28,521 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:17:28,521 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1394990059] [2021-05-02 19:17:28,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:17:28,525 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 19:17:28,525 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [170612631] [2021-05-02 19:17:28,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2021-05-02 19:17:28,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:17:28,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 30 conjunts are in the unsatisfiable core [2021-05-02 19:17:28,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:17:28,610 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:17:28,611 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:17:28,616 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:17:28,620 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:17:28,630 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:17:28,631 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:17:28,637 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:17:28,637 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:17:28,643 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:17:28,644 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:17:28,650 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:17:28,651 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:17:28,670 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:17:28,722 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:17:28,723 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:17:28,730 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:17:28,731 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:17:28,738 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:17:28,739 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:17:28,747 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:17:28,748 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:17:28,778 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:17:28,779 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:17:28,787 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:17:28,788 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:17:28,795 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:17:28,796 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:17:28,804 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:17:28,805 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:17:28,827 INFO L134 CoverageAnalysis]: Checked inductivity of 270 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 221 trivial. 0 not checked. [2021-05-02 19:17:28,828 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:17:28,828 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1394990059] [2021-05-02 19:17:28,828 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 19:17:28,828 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [170612631] [2021-05-02 19:17:28,828 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [170612631] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 19:17:28,829 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 19:17:28,829 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2021-05-02 19:17:28,830 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157854872] [2021-05-02 19:17:28,830 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-02 19:17:28,830 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:17:28,830 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-02 19:17:28,830 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2021-05-02 19:17:28,831 INFO L87 Difference]: Start difference. First operand 653 states and 954 transitions. Second operand has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 12 states have internal predecessors, (33), 5 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) [2021-05-02 19:17:29,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:17:29,395 INFO L93 Difference]: Finished difference Result 814 states and 1224 transitions. [2021-05-02 19:17:29,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-05-02 19:17:29,409 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 12 states have internal predecessors, (33), 5 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) Word has length 93 [2021-05-02 19:17:29,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:17:29,412 INFO L225 Difference]: With dead ends: 814 [2021-05-02 19:17:29,412 INFO L226 Difference]: Without dead ends: 814 [2021-05-02 19:17:29,412 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 374.3ms TimeCoverageRelationStatistics Valid=207, Invalid=723, Unknown=0, NotChecked=0, Total=930 [2021-05-02 19:17:29,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 814 states. [2021-05-02 19:17:29,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 814 to 757. [2021-05-02 19:17:29,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 757 states, 380 states have (on average 1.2026315789473685) internal successors, (457), 407 states have internal predecessors, (457), 341 states have call successors, (341), 36 states have call predecessors, (341), 35 states have return successors, (339), 313 states have call predecessors, (339), 339 states have call successors, (339) [2021-05-02 19:17:29,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 757 states to 757 states and 1137 transitions. [2021-05-02 19:17:29,429 INFO L78 Accepts]: Start accepts. Automaton has 757 states and 1137 transitions. Word has length 93 [2021-05-02 19:17:29,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:17:29,429 INFO L480 AbstractCegarLoop]: Abstraction has 757 states and 1137 transitions. [2021-05-02 19:17:29,429 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 12 states have internal predecessors, (33), 5 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) [2021-05-02 19:17:29,429 INFO L276 IsEmpty]: Start isEmpty. Operand 757 states and 1137 transitions. [2021-05-02 19:17:29,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-05-02 19:17:29,430 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:17:29,430 INFO L523 BasicCegarLoop]: trace histogram [13, 12, 12, 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, 1, 1, 1, 1, 1, 1] [2021-05-02 19:17:29,658 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-05-02 19:17:29,658 INFO L428 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:17:29,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:17:29,658 INFO L82 PathProgramCache]: Analyzing trace with hash 630865143, now seen corresponding path program 3 times [2021-05-02 19:17:29,659 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:17:29,659 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1896680805] [2021-05-02 19:17:29,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:17:29,663 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 19:17:29,663 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [647601323] [2021-05-02 19:17:29,663 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 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 [2021-05-02 19:17:29,717 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-02 19:17:29,718 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 19:17:29,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 60 conjunts are in the unsatisfiable core [2021-05-02 19:17:29,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:17:29,759 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:17:29,760 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:17:29,834 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:17:29,835 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:17:29,866 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:17:29,867 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:17:29,875 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:17:29,876 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:17:29,884 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:17:29,885 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:17:29,896 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:17:29,913 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:17:29,920 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:17:29,921 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:17:29,928 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:17:29,929 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:17:29,936 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:17:29,937 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:17:29,975 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:17:29,993 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:17:30,006 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:17:30,007 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:17:30,030 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:17:30,031 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:17:30,038 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:17:30,039 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:17:30,230 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:17:30,231 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:17:30,233 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:17:30,235 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:17:30,236 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:17:30,240 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:17:30,242 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:17:30,243 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:17:30,244 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:17:30,245 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:17:30,245 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:17:30,246 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:17:30,247 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:17:30,248 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:17:30,249 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:17:30,251 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:17:30,252 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:17:30,253 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:17:30,254 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:17:30,256 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:17:30,257 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:17:30,257 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:17:30,258 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:17:30,259 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:17:30,261 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:17:30,298 INFO L134 CoverageAnalysis]: Checked inductivity of 314 backedges. 68 proven. 8 refuted. 0 times theorem prover too weak. 238 trivial. 0 not checked. [2021-05-02 19:17:30,298 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:17:30,298 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1896680805] [2021-05-02 19:17:30,298 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 19:17:30,298 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [647601323] [2021-05-02 19:17:30,298 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [647601323] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 19:17:30,298 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 19:17:30,298 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2021-05-02 19:17:30,298 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109630918] [2021-05-02 19:17:30,299 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-02 19:17:30,299 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:17:30,299 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-02 19:17:30,299 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2021-05-02 19:17:30,299 INFO L87 Difference]: Start difference. First operand 757 states and 1137 transitions. Second operand has 17 states, 16 states have (on average 2.125) internal successors, (34), 15 states have internal predecessors, (34), 5 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (11), 5 states have call predecessors, (11), 4 states have call successors, (11) [2021-05-02 19:17:33,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:17:33,107 INFO L93 Difference]: Finished difference Result 841 states and 1271 transitions. [2021-05-02 19:17:33,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-02 19:17:33,108 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.125) internal successors, (34), 15 states have internal predecessors, (34), 5 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (11), 5 states have call predecessors, (11), 4 states have call successors, (11) Word has length 97 [2021-05-02 19:17:33,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:17:33,108 INFO L225 Difference]: With dead ends: 841 [2021-05-02 19:17:33,108 INFO L226 Difference]: Without dead ends: 0 [2021-05-02 19:17:33,108 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 447.2ms TimeCoverageRelationStatistics Valid=120, Invalid=582, Unknown=0, NotChecked=0, Total=702 [2021-05-02 19:17:33,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-05-02 19:17:33,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-05-02 19:17:33,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-02 19:17:33,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-05-02 19:17:33,109 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 97 [2021-05-02 19:17:33,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:17:33,109 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-05-02 19:17:33,109 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 16 states have (on average 2.125) internal successors, (34), 15 states have internal predecessors, (34), 5 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (11), 5 states have call predecessors, (11), 4 states have call successors, (11) [2021-05-02 19:17:33,109 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-05-02 19:17:33,109 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-05-02 19:17:33,309 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-05-02 19:17:33,313 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 07:17:33 BasicIcfg [2021-05-02 19:17:33,313 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-02 19:17:33,313 INFO L168 Benchmark]: Toolchain (without parser) took 55863.28 ms. Allocated memory was 212.9 MB in the beginning and 307.2 MB in the end (delta: 94.4 MB). Free memory was 178.7 MB in the beginning and 167.1 MB in the end (delta: 11.6 MB). Peak memory consumption was 106.8 MB. Max. memory is 8.0 GB. [2021-05-02 19:17:33,313 INFO L168 Benchmark]: CDTParser took 0.10 ms. Allocated memory is still 212.9 MB. Free memory is still 195.0 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-02 19:17:33,313 INFO L168 Benchmark]: CACSL2BoogieTranslator took 237.42 ms. Allocated memory is still 212.9 MB. Free memory was 178.5 MB in the beginning and 196.7 MB in the end (delta: -18.2 MB). Peak memory consumption was 14.0 MB. Max. memory is 8.0 GB. [2021-05-02 19:17:33,313 INFO L168 Benchmark]: Boogie Preprocessor took 34.88 ms. Allocated memory is still 212.9 MB. Free memory was 196.7 MB in the beginning and 195.1 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-05-02 19:17:33,313 INFO L168 Benchmark]: RCFGBuilder took 334.76 ms. Allocated memory is still 212.9 MB. Free memory was 195.1 MB in the beginning and 178.3 MB in the end (delta: 16.8 MB). Peak memory consumption was 16.8 MB. Max. memory is 8.0 GB. [2021-05-02 19:17:33,313 INFO L168 Benchmark]: IcfgTransformer took 13.67 ms. Allocated memory is still 212.9 MB. Free memory was 178.3 MB in the beginning and 176.8 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-05-02 19:17:33,313 INFO L168 Benchmark]: TraceAbstraction took 55236.85 ms. Allocated memory was 212.9 MB in the beginning and 307.2 MB in the end (delta: 94.4 MB). Free memory was 176.8 MB in the beginning and 167.1 MB in the end (delta: 9.7 MB). Peak memory consumption was 105.4 MB. Max. memory is 8.0 GB. [2021-05-02 19:17:33,314 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.10 ms. Allocated memory is still 212.9 MB. Free memory is still 195.0 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 237.42 ms. Allocated memory is still 212.9 MB. Free memory was 178.5 MB in the beginning and 196.7 MB in the end (delta: -18.2 MB). Peak memory consumption was 14.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 34.88 ms. Allocated memory is still 212.9 MB. Free memory was 196.7 MB in the beginning and 195.1 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 334.76 ms. Allocated memory is still 212.9 MB. Free memory was 195.1 MB in the beginning and 178.3 MB in the end (delta: 16.8 MB). Peak memory consumption was 16.8 MB. Max. memory is 8.0 GB. * IcfgTransformer took 13.67 ms. Allocated memory is still 212.9 MB. Free memory was 178.3 MB in the beginning and 176.8 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * TraceAbstraction took 55236.85 ms. Allocated memory was 212.9 MB in the beginning and 307.2 MB in the end (delta: 94.4 MB). Free memory was 176.8 MB in the beginning and 167.1 MB in the end (delta: 9.7 MB). Peak memory consumption was 105.4 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 13]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 37 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 55196.1ms, OverallIterations: 27, TraceHistogramMax: 13, EmptinessCheckTime: 31.4ms, AutomataDifference: 39518.7ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 5.9ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 1243 SDtfs, 1465 SDslu, 7307 SDs, 0 SdLazy, 8758 SolverSat, 1291 SolverUnsat, 7 SolverUnknown, 0 SolverNotchecked, 18808.3ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1715 GetRequests, 1252 SyntacticMatches, 8 SemanticMatches, 455 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1950 ImplicationChecksByTransitivity, 23933.4ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=757occurred in iteration=26, InterpolantAutomatonStates: 362, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 254.0ms AutomataMinimizationTime, 27 MinimizatonAttempts, 598 StatesRemovedByMinimization, 25 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 204.2ms SsaConstructionTime, 590.0ms SatisfiabilityAnalysisTime, 8170.9ms InterpolantComputationTime, 1549 NumberOfCodeBlocks, 1445 NumberOfCodeBlocksAsserted, 47 NumberOfCheckSat, 1522 ConstructedInterpolants, 0 QuantifiedInterpolants, 9602 SizeOfPredicates, 176 NumberOfNonLiveVariables, 5135 ConjunctsInSsa, 884 ConjunctsInUnsatCore, 27 InterpolantComputations, 6 PerfectInterpolantSequences, 2096/2506 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! Received shutdown request...