/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerCTransformed.xml -s ../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf -i ../../../trunk/examples/svcomp/nla-digbench-scaling/cohendiv-ll_unwindbound5.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-6253b08 [2021-05-06 07:24:04,449 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-06 07:24:04,451 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-06 07:24:04,469 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-06 07:24:04,475 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-06 07:24:04,476 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-06 07:24:04,476 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-06 07:24:04,477 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-06 07:24:04,478 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-06 07:24:04,478 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-06 07:24:04,479 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-06 07:24:04,480 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-06 07:24:04,481 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-06 07:24:04,485 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-06 07:24:04,485 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-06 07:24:04,486 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-06 07:24:04,487 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-06 07:24:04,492 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-06 07:24:04,493 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-06 07:24:04,493 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-06 07:24:04,494 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2021-05-06 07:24:04,501 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-06 07:24:04,501 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-06 07:24:04,502 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-06 07:24:04,502 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-06 07:24:04,503 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-06 07:24:04,503 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-06 07:24:04,503 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-06 07:24:04,503 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-06 07:24:04,503 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-06 07:24:04,503 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-06 07:24:04,503 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-06 07:24:04,503 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-06 07:24:04,503 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-06 07:24:04,504 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-06 07:24:04,504 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-06 07:24:04,504 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-06 07:24:04,504 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-06 07:24:04,504 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-06 07:24:04,504 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 07:24:04,504 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-06 07:24:04,504 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-06 07:24:04,505 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-05-06 07:24:04,505 INFO L138 SettingsManager]: * TransformationType=LOOP_ACCELERATION_JORDAN WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-06 07:24:04,766 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-06 07:24:04,788 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-06 07:24:04,790 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-06 07:24:04,790 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-06 07:24:04,791 INFO L275 PluginConnector]: CDTParser initialized [2021-05-06 07:24:04,792 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/cohendiv-ll_unwindbound5.c [2021-05-06 07:24:04,841 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b07cfe368/23e58d8cccaa4f8bb331cd4f819922e3/FLAG00824a886 [2021-05-06 07:24:05,188 INFO L306 CDTParser]: Found 1 translation units. [2021-05-06 07:24:05,188 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/cohendiv-ll_unwindbound5.c [2021-05-06 07:24:05,193 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b07cfe368/23e58d8cccaa4f8bb331cd4f819922e3/FLAG00824a886 [2021-05-06 07:24:05,605 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b07cfe368/23e58d8cccaa4f8bb331cd4f819922e3 [2021-05-06 07:24:05,607 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-06 07:24:05,608 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-05-06 07:24:05,609 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-06 07:24:05,609 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-06 07:24:05,612 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-06 07:24:05,612 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 07:24:05" (1/1) ... [2021-05-06 07:24:05,613 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@32273eea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:24:05, skipping insertion in model container [2021-05-06 07:24:05,613 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 07:24:05" (1/1) ... [2021-05-06 07:24:05,618 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-06 07:24:05,628 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-06 07:24:05,721 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/cohendiv-ll_unwindbound5.c[576,589] [2021-05-06 07:24:05,730 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 07:24:05,735 INFO L203 MainTranslator]: Completed pre-run [2021-05-06 07:24:05,743 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/cohendiv-ll_unwindbound5.c[576,589] [2021-05-06 07:24:05,747 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 07:24:05,756 INFO L208 MainTranslator]: Completed translation [2021-05-06 07:24:05,756 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:24:05 WrapperNode [2021-05-06 07:24:05,756 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-06 07:24:05,766 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-06 07:24:05,766 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-06 07:24:05,766 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-06 07:24:05,790 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:24:05" (1/1) ... [2021-05-06 07:24:05,792 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:24:05" (1/1) ... [2021-05-06 07:24:05,797 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:24:05" (1/1) ... [2021-05-06 07:24:05,797 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:24:05" (1/1) ... [2021-05-06 07:24:05,809 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:24:05" (1/1) ... [2021-05-06 07:24:05,812 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:24:05" (1/1) ... [2021-05-06 07:24:05,813 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:24:05" (1/1) ... [2021-05-06 07:24:05,817 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-06 07:24:05,819 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-06 07:24:05,819 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-06 07:24:05,819 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-06 07:24:05,820 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:24:05" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 07:24:05,883 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-06 07:24:05,883 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-06 07:24:05,883 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-06 07:24:05,884 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-06 07:24:05,884 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-06 07:24:05,884 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-06 07:24:05,884 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-06 07:24:05,884 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-06 07:24:05,884 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-06 07:24:05,884 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-06 07:24:05,884 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-06 07:24:05,885 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-06 07:24:05,885 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-06 07:24:05,885 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-06 07:24:05,885 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-06 07:24:05,885 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-06 07:24:05,885 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-06 07:24:05,886 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-06 07:24:05,886 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-06 07:24:05,886 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-06 07:24:06,153 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-06 07:24:06,153 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-05-06 07:24:06,154 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 07:24:06 BoogieIcfgContainer [2021-05-06 07:24:06,154 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-06 07:24:06,155 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2021-05-06 07:24:06,155 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2021-05-06 07:24:06,155 INFO L275 PluginConnector]: IcfgTransformer initialized [2021-05-06 07:24:06,157 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 07:24:06" (1/1) ... [2021-05-06 07:24:06,173 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.05 07:24:06 BasicIcfg [2021-05-06 07:24:06,173 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2021-05-06 07:24:06,176 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-06 07:24:06,176 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-06 07:24:06,178 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-06 07:24:06,179 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.05 07:24:05" (1/4) ... [2021-05-06 07:24:06,179 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@48133f9e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 07:24:06, skipping insertion in model container [2021-05-06 07:24:06,179 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:24:05" (2/4) ... [2021-05-06 07:24:06,180 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@48133f9e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 07:24:06, skipping insertion in model container [2021-05-06 07:24:06,180 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 07:24:06" (3/4) ... [2021-05-06 07:24:06,181 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@48133f9e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.05 07:24:06, skipping insertion in model container [2021-05-06 07:24:06,181 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.05 07:24:06" (4/4) ... [2021-05-06 07:24:06,182 INFO L111 eAbstractionObserver]: Analyzing ICFG cohendiv-ll_unwindbound5.cJordan [2021-05-06 07:24:06,185 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2021-05-06 07:24:06,188 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-06 07:24:06,198 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-06 07:24:06,211 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-06 07:24:06,211 INFO L377 AbstractCegarLoop]: Hoare is false [2021-05-06 07:24:06,211 INFO L378 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2021-05-06 07:24:06,211 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-06 07:24:06,211 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-06 07:24:06,211 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-06 07:24:06,211 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-06 07:24:06,211 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-06 07:24:06,220 INFO L276 IsEmpty]: Start isEmpty. Operand has 38 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 23 states have internal predecessors, (31), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-05-06 07:24:06,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-06 07:24:06,225 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 07:24:06,225 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 07:24:06,225 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 07:24:06,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 07:24:06,229 INFO L82 PathProgramCache]: Analyzing trace with hash 1213541379, now seen corresponding path program 1 times [2021-05-06 07:24:06,234 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 07:24:06,234 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [845221045] [2021-05-06 07:24:06,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 07:24:06,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 07:24:06,357 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 07:24:06,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 07:24:06,368 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-06 07:24:06,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 07:24:06,372 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 07:24:06,372 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 07:24:06,372 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [845221045] [2021-05-06 07:24:06,373 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [845221045] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 07:24:06,373 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 07:24:06,373 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-06 07:24:06,374 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [612369849] [2021-05-06 07:24:06,376 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-06 07:24:06,377 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 07:24:06,384 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-06 07:24:06,385 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 07:24:06,386 INFO L87 Difference]: Start difference. First operand has 38 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 23 states have internal predecessors, (31), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-06 07:24:06,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 07:24:06,527 INFO L93 Difference]: Finished difference Result 39 states and 48 transitions. [2021-05-06 07:24:06,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-06 07:24:06,528 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, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2021-05-06 07:24:06,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 07:24:06,533 INFO L225 Difference]: With dead ends: 39 [2021-05-06 07:24:06,533 INFO L226 Difference]: Without dead ends: 34 [2021-05-06 07:24:06,534 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 35.8ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 07:24:06,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-05-06 07:24:06,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2021-05-06 07:24:06,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 19 states have (on average 1.263157894736842) internal successors, (24), 20 states have internal predecessors, (24), 10 states have call successors, (10), 4 states have call predecessors, (10), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-06 07:24:06,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 42 transitions. [2021-05-06 07:24:06,571 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 42 transitions. Word has length 17 [2021-05-06 07:24:06,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 07:24:06,571 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 42 transitions. [2021-05-06 07:24:06,571 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, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-06 07:24:06,572 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 42 transitions. [2021-05-06 07:24:06,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-06 07:24:06,573 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 07:24:06,573 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 07:24:06,573 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-06 07:24:06,573 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 07:24:06,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 07:24:06,575 INFO L82 PathProgramCache]: Analyzing trace with hash -1202035559, now seen corresponding path program 1 times [2021-05-06 07:24:06,575 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 07:24:06,576 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [54416521] [2021-05-06 07:24:06,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 07:24:06,605 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 07:24:06,605 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1349686371] [2021-05-06 07:24:06,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 07:24:06,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 07:24:06,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-06 07:24:06,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 07:24:06,735 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:24:06,743 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:24:06,747 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:24:06,791 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:24:06,799 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:24:06,816 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 07:24:06,816 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 07:24:06,818 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [54416521] [2021-05-06 07:24:06,818 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 07:24:06,818 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1349686371] [2021-05-06 07:24:06,818 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1349686371] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 07:24:06,818 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 07:24:06,819 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-06 07:24:06,819 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1309736508] [2021-05-06 07:24:06,820 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-06 07:24:06,820 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 07:24:06,821 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-06 07:24:06,821 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-06 07:24:06,821 INFO L87 Difference]: Start difference. First operand 33 states and 42 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-06 07:24:06,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 07:24:06,839 INFO L93 Difference]: Finished difference Result 35 states and 44 transitions. [2021-05-06 07:24:06,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-06 07:24:06,839 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 18 [2021-05-06 07:24:06,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 07:24:06,840 INFO L225 Difference]: With dead ends: 35 [2021-05-06 07:24:06,840 INFO L226 Difference]: Without dead ends: 35 [2021-05-06 07:24:06,841 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.2ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-06 07:24:06,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-05-06 07:24:06,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2021-05-06 07:24:06,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 21 states have (on average 1.2380952380952381) internal successors, (26), 22 states have internal predecessors, (26), 10 states have call successors, (10), 4 states have call predecessors, (10), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-06 07:24:06,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 44 transitions. [2021-05-06 07:24:06,855 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 44 transitions. Word has length 18 [2021-05-06 07:24:06,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 07:24:06,855 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 44 transitions. [2021-05-06 07:24:06,855 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-06 07:24:06,856 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 44 transitions. [2021-05-06 07:24:06,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-06 07:24:06,860 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 07:24:06,860 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 07:24:07,077 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-06 07:24:07,077 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 07:24:07,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 07:24:07,078 INFO L82 PathProgramCache]: Analyzing trace with hash -1200933292, now seen corresponding path program 1 times [2021-05-06 07:24:07,078 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 07:24:07,078 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1748535268] [2021-05-06 07:24:07,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 07:24:07,087 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 07:24:07,087 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2009538773] [2021-05-06 07:24:07,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 07:24:07,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 07:24:07,144 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-06 07:24:07,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 07:24:07,193 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:24:07,209 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:24:07,218 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:24:07,228 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 07:24:07,228 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 07:24:07,228 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1748535268] [2021-05-06 07:24:07,228 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 07:24:07,228 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2009538773] [2021-05-06 07:24:07,228 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2009538773] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 07:24:07,228 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 07:24:07,228 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-06 07:24:07,228 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [145760324] [2021-05-06 07:24:07,229 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 07:24:07,229 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 07:24:07,229 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 07:24:07,229 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-06 07:24:07,229 INFO L87 Difference]: Start difference. First operand 35 states and 44 transitions. Second operand has 8 states, 8 states have (on average 1.5) internal successors, (12), 6 states have internal predecessors, (12), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-06 07:24:07,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 07:24:07,306 INFO L93 Difference]: Finished difference Result 43 states and 54 transitions. [2021-05-06 07:24:07,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 07:24:07,306 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.5) internal successors, (12), 6 states have internal predecessors, (12), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 18 [2021-05-06 07:24:07,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 07:24:07,307 INFO L225 Difference]: With dead ends: 43 [2021-05-06 07:24:07,307 INFO L226 Difference]: Without dead ends: 43 [2021-05-06 07:24:07,307 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 41.1ms TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-05-06 07:24:07,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-05-06 07:24:07,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 40. [2021-05-06 07:24:07,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 24 states have (on average 1.2083333333333333) internal successors, (29), 26 states have internal predecessors, (29), 11 states have call successors, (11), 5 states have call predecessors, (11), 4 states have return successors, (9), 8 states have call predecessors, (9), 9 states have call successors, (9) [2021-05-06 07:24:07,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 49 transitions. [2021-05-06 07:24:07,312 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 49 transitions. Word has length 18 [2021-05-06 07:24:07,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 07:24:07,312 INFO L480 AbstractCegarLoop]: Abstraction has 40 states and 49 transitions. [2021-05-06 07:24:07,313 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 1.5) internal successors, (12), 6 states have internal predecessors, (12), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-06 07:24:07,313 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 49 transitions. [2021-05-06 07:24:07,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-06 07:24:07,313 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 07:24:07,313 INFO L523 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 07:24:07,529 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 07:24:07,529 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 07:24:07,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 07:24:07,530 INFO L82 PathProgramCache]: Analyzing trace with hash -944097291, now seen corresponding path program 1 times [2021-05-06 07:24:07,530 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 07:24:07,530 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1129339036] [2021-05-06 07:24:07,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 07:24:07,539 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 07:24:07,539 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [721562435] [2021-05-06 07:24:07,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 07:24:07,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 07:24:07,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-06 07:24:07,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 07:24:07,688 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:24:07,690 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:24:07,704 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:24:07,708 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:24:07,718 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:24:07,731 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 07:24:07,731 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 07:24:07,731 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1129339036] [2021-05-06 07:24:07,731 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 07:24:07,731 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [721562435] [2021-05-06 07:24:07,732 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [721562435] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 07:24:07,732 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 07:24:07,732 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-06 07:24:07,732 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932451774] [2021-05-06 07:24:07,732 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 07:24:07,732 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 07:24:07,733 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 07:24:07,733 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-06 07:24:07,733 INFO L87 Difference]: Start difference. First operand 40 states and 49 transitions. Second operand has 8 states, 8 states have (on average 1.875) internal successors, (15), 6 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 07:24:07,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 07:24:07,826 INFO L93 Difference]: Finished difference Result 56 states and 72 transitions. [2021-05-06 07:24:07,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 07:24:07,826 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.875) internal successors, (15), 6 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 23 [2021-05-06 07:24:07,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 07:24:07,827 INFO L225 Difference]: With dead ends: 56 [2021-05-06 07:24:07,827 INFO L226 Difference]: Without dead ends: 55 [2021-05-06 07:24:07,827 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 55.9ms TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-05-06 07:24:07,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-05-06 07:24:07,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 54. [2021-05-06 07:24:07,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 32 states have (on average 1.21875) internal successors, (39), 33 states have internal predecessors, (39), 16 states have call successors, (16), 6 states have call predecessors, (16), 5 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2021-05-06 07:24:07,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 69 transitions. [2021-05-06 07:24:07,832 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 69 transitions. Word has length 23 [2021-05-06 07:24:07,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 07:24:07,833 INFO L480 AbstractCegarLoop]: Abstraction has 54 states and 69 transitions. [2021-05-06 07:24:07,833 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 1.875) internal successors, (15), 6 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 07:24:07,833 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 69 transitions. [2021-05-06 07:24:07,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-05-06 07:24:07,833 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 07:24:07,834 INFO L523 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 07:24:08,049 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 07:24:08,049 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 07:24:08,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 07:24:08,050 INFO L82 PathProgramCache]: Analyzing trace with hash -653220550, now seen corresponding path program 1 times [2021-05-06 07:24:08,050 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 07:24:08,050 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1788263240] [2021-05-06 07:24:08,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 07:24:08,058 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 07:24:08,058 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1738083237] [2021-05-06 07:24:08,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 07:24:08,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 07:24:08,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-06 07:24:08,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 07:24:08,188 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:24:08,194 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 07:24:08,195 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 07:24:08,195 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1788263240] [2021-05-06 07:24:08,195 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 07:24:08,195 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1738083237] [2021-05-06 07:24:08,195 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1738083237] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 07:24:08,195 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 07:24:08,195 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 07:24:08,195 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231515] [2021-05-06 07:24:08,196 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 07:24:08,196 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 07:24:08,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 07:24:08,196 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-06 07:24:08,196 INFO L87 Difference]: Start difference. First operand 54 states and 69 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-05-06 07:24:08,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 07:24:08,236 INFO L93 Difference]: Finished difference Result 81 states and 111 transitions. [2021-05-06 07:24:08,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-06 07:24:08,237 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 31 [2021-05-06 07:24:08,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 07:24:08,238 INFO L225 Difference]: With dead ends: 81 [2021-05-06 07:24:08,238 INFO L226 Difference]: Without dead ends: 81 [2021-05-06 07:24:08,239 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 13.6ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-06 07:24:08,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-05-06 07:24:08,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 74. [2021-05-06 07:24:08,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 44 states have (on average 1.2727272727272727) internal successors, (56), 46 states have internal predecessors, (56), 23 states have call successors, (23), 7 states have call predecessors, (23), 6 states have return successors, (21), 20 states have call predecessors, (21), 21 states have call successors, (21) [2021-05-06 07:24:08,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 100 transitions. [2021-05-06 07:24:08,245 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 100 transitions. Word has length 31 [2021-05-06 07:24:08,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 07:24:08,245 INFO L480 AbstractCegarLoop]: Abstraction has 74 states and 100 transitions. [2021-05-06 07:24:08,245 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-05-06 07:24:08,245 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 100 transitions. [2021-05-06 07:24:08,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-05-06 07:24:08,245 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 07:24:08,246 INFO L523 BasicCegarLoop]: trace histogram [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] [2021-05-06 07:24:08,458 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 07:24:08,459 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 07:24:08,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 07:24:08,459 INFO L82 PathProgramCache]: Analyzing trace with hash -830156892, now seen corresponding path program 1 times [2021-05-06 07:24:08,459 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 07:24:08,459 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [199205990] [2021-05-06 07:24:08,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 07:24:08,468 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 07:24:08,468 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [408540600] [2021-05-06 07:24:08,468 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 [2021-05-06 07:24:08,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 07:24:08,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-06 07:24:08,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 07:24:08,537 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:24:08,539 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:24:08,540 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:24:08,552 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:24:08,554 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:24:08,555 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:24:08,574 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:24:08,576 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:24:08,587 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 07:24:08,587 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 07:24:08,588 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [199205990] [2021-05-06 07:24:08,588 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 07:24:08,588 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [408540600] [2021-05-06 07:24:08,588 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [408540600] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 07:24:08,588 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 07:24:08,588 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 07:24:08,588 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508859198] [2021-05-06 07:24:08,588 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 07:24:08,588 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 07:24:08,589 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 07:24:08,589 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-06 07:24:08,589 INFO L87 Difference]: Start difference. First operand 74 states and 100 transitions. Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-06 07:24:08,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 07:24:08,609 INFO L93 Difference]: Finished difference Result 78 states and 102 transitions. [2021-05-06 07:24:08,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-06 07:24:08,610 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) Word has length 34 [2021-05-06 07:24:08,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 07:24:08,612 INFO L225 Difference]: With dead ends: 78 [2021-05-06 07:24:08,612 INFO L226 Difference]: Without dead ends: 78 [2021-05-06 07:24:08,612 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 7.2ms TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-06 07:24:08,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-05-06 07:24:08,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2021-05-06 07:24:08,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 47 states have (on average 1.2340425531914894) internal successors, (58), 49 states have internal predecessors, (58), 23 states have call successors, (23), 8 states have call predecessors, (23), 7 states have return successors, (21), 20 states have call predecessors, (21), 21 states have call successors, (21) [2021-05-06 07:24:08,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 102 transitions. [2021-05-06 07:24:08,616 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 102 transitions. Word has length 34 [2021-05-06 07:24:08,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 07:24:08,617 INFO L480 AbstractCegarLoop]: Abstraction has 78 states and 102 transitions. [2021-05-06 07:24:08,617 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-06 07:24:08,617 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 102 transitions. [2021-05-06 07:24:08,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-05-06 07:24:08,617 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 07:24:08,618 INFO L523 BasicCegarLoop]: trace histogram [5, 4, 4, 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] [2021-05-06 07:24:08,835 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-05-06 07:24:08,835 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 07:24:08,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 07:24:08,836 INFO L82 PathProgramCache]: Analyzing trace with hash -1527688582, now seen corresponding path program 1 times [2021-05-06 07:24:08,836 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 07:24:08,836 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2033520070] [2021-05-06 07:24:08,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 07:24:08,852 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 07:24:08,853 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [592410918] [2021-05-06 07:24:08,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 07:24:08,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 07:24:08,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-06 07:24:08,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 07:24:08,972 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:24:08,973 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:24:08,980 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:24:08,982 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:24:08,991 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:24:09,001 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:24:09,002 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:24:09,009 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:24:09,010 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:24:09,016 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:24:09,019 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:24:09,034 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:24:09,043 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-05-06 07:24:09,044 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 07:24:09,044 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2033520070] [2021-05-06 07:24:09,044 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 07:24:09,046 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [592410918] [2021-05-06 07:24:09,046 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [592410918] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 07:24:09,046 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 07:24:09,046 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-06 07:24:09,046 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [554407924] [2021-05-06 07:24:09,046 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 07:24:09,047 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 07:24:09,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 07:24:09,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-05-06 07:24:09,047 INFO L87 Difference]: Start difference. First operand 78 states and 102 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2021-05-06 07:24:09,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 07:24:09,114 INFO L93 Difference]: Finished difference Result 82 states and 105 transitions. [2021-05-06 07:24:09,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 07:24:09,115 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 41 [2021-05-06 07:24:09,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 07:24:09,116 INFO L225 Difference]: With dead ends: 82 [2021-05-06 07:24:09,117 INFO L226 Difference]: Without dead ends: 82 [2021-05-06 07:24:09,117 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 35.3ms TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-05-06 07:24:09,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2021-05-06 07:24:09,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2021-05-06 07:24:09,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 50 states have (on average 1.22) internal successors, (61), 52 states have internal predecessors, (61), 23 states have call successors, (23), 9 states have call predecessors, (23), 8 states have return successors, (21), 20 states have call predecessors, (21), 21 states have call successors, (21) [2021-05-06 07:24:09,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 105 transitions. [2021-05-06 07:24:09,123 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 105 transitions. Word has length 41 [2021-05-06 07:24:09,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 07:24:09,123 INFO L480 AbstractCegarLoop]: Abstraction has 82 states and 105 transitions. [2021-05-06 07:24:09,123 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2021-05-06 07:24:09,123 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 105 transitions. [2021-05-06 07:24:09,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-06 07:24:09,124 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 07:24:09,124 INFO L523 BasicCegarLoop]: trace histogram [6, 5, 5, 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, 1] [2021-05-06 07:24:09,337 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 07:24:09,337 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 07:24:09,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 07:24:09,337 INFO L82 PathProgramCache]: Analyzing trace with hash 800232443, now seen corresponding path program 1 times [2021-05-06 07:24:09,338 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 07:24:09,338 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1540491353] [2021-05-06 07:24:09,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 07:24:09,344 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 07:24:09,345 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1760177838] [2021-05-06 07:24:09,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 07:24:09,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 07:24:09,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-06 07:24:09,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 07:24:09,487 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:24:09,492 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:24:09,501 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:24:09,510 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 15 proven. 7 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-05-06 07:24:09,510 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 07:24:09,510 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1540491353] [2021-05-06 07:24:09,510 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 07:24:09,510 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1760177838] [2021-05-06 07:24:09,511 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1760177838] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 07:24:09,511 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 07:24:09,511 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-06 07:24:09,511 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1708684195] [2021-05-06 07:24:09,511 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 07:24:09,511 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 07:24:09,511 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 07:24:09,512 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-06 07:24:09,512 INFO L87 Difference]: Start difference. First operand 82 states and 105 transitions. Second operand has 8 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-05-06 07:24:09,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 07:24:09,598 INFO L93 Difference]: Finished difference Result 86 states and 108 transitions. [2021-05-06 07:24:09,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 07:24:09,599 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 47 [2021-05-06 07:24:09,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 07:24:09,600 INFO L225 Difference]: With dead ends: 86 [2021-05-06 07:24:09,600 INFO L226 Difference]: Without dead ends: 86 [2021-05-06 07:24:09,600 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 40.9ms TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-05-06 07:24:09,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-05-06 07:24:09,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2021-05-06 07:24:09,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 53 states have (on average 1.2075471698113207) internal successors, (64), 55 states have internal predecessors, (64), 23 states have call successors, (23), 10 states have call predecessors, (23), 9 states have return successors, (21), 20 states have call predecessors, (21), 21 states have call successors, (21) [2021-05-06 07:24:09,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 108 transitions. [2021-05-06 07:24:09,610 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 108 transitions. Word has length 47 [2021-05-06 07:24:09,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 07:24:09,611 INFO L480 AbstractCegarLoop]: Abstraction has 86 states and 108 transitions. [2021-05-06 07:24:09,611 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-05-06 07:24:09,611 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 108 transitions. [2021-05-06 07:24:09,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-05-06 07:24:09,612 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 07:24:09,612 INFO L523 BasicCegarLoop]: trace histogram [6, 5, 5, 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, 1, 1] [2021-05-06 07:24:09,831 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 07:24:09,831 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 07:24:09,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 07:24:09,831 INFO L82 PathProgramCache]: Analyzing trace with hash -1984817020, now seen corresponding path program 1 times [2021-05-06 07:24:09,831 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 07:24:09,831 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [622229890] [2021-05-06 07:24:09,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 07:24:09,839 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 07:24:09,840 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1192979794] [2021-05-06 07:24:09,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 07:24:09,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 07:24:09,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-06 07:24:09,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 07:24:09,957 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:24:09,961 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:24:09,962 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:24:09,975 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:24:09,976 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:24:09,977 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:24:09,997 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:24:09,999 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:24:10,001 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:24:10,034 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:24:10,035 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:24:10,047 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 10 proven. 26 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-05-06 07:24:10,047 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 07:24:10,048 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [622229890] [2021-05-06 07:24:10,048 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 07:24:10,048 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1192979794] [2021-05-06 07:24:10,048 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1192979794] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 07:24:10,048 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 07:24:10,048 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-06 07:24:10,048 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026174896] [2021-05-06 07:24:10,048 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 07:24:10,048 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 07:24:10,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 07:24:10,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-06 07:24:10,049 INFO L87 Difference]: Start difference. First operand 86 states and 108 transitions. Second operand has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 5 states have call successors, (9), 5 states have call predecessors, (9), 3 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) [2021-05-06 07:24:10,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 07:24:10,090 INFO L93 Difference]: Finished difference Result 108 states and 127 transitions. [2021-05-06 07:24:10,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-06 07:24:10,090 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 5 states have call successors, (9), 5 states have call predecessors, (9), 3 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) Word has length 50 [2021-05-06 07:24:10,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 07:24:10,094 INFO L225 Difference]: With dead ends: 108 [2021-05-06 07:24:10,094 INFO L226 Difference]: Without dead ends: 108 [2021-05-06 07:24:10,094 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 15.5ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-05-06 07:24:10,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2021-05-06 07:24:10,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 106. [2021-05-06 07:24:10,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 68 states have (on average 1.161764705882353) internal successors, (79), 71 states have internal predecessors, (79), 24 states have call successors, (24), 14 states have call predecessors, (24), 13 states have return successors, (22), 20 states have call predecessors, (22), 22 states have call successors, (22) [2021-05-06 07:24:10,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 125 transitions. [2021-05-06 07:24:10,117 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 125 transitions. Word has length 50 [2021-05-06 07:24:10,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 07:24:10,118 INFO L480 AbstractCegarLoop]: Abstraction has 106 states and 125 transitions. [2021-05-06 07:24:10,118 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 5 states have call successors, (9), 5 states have call predecessors, (9), 3 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) [2021-05-06 07:24:10,118 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 125 transitions. [2021-05-06 07:24:10,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-05-06 07:24:10,118 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 07:24:10,119 INFO L523 BasicCegarLoop]: trace histogram [7, 6, 6, 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] [2021-05-06 07:24:10,325 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-05-06 07:24:10,325 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 07:24:10,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 07:24:10,325 INFO L82 PathProgramCache]: Analyzing trace with hash 960315114, now seen corresponding path program 1 times [2021-05-06 07:24:10,326 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 07:24:10,326 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [272949761] [2021-05-06 07:24:10,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 07:24:10,332 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 07:24:10,332 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1127335126] [2021-05-06 07:24:10,332 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 [2021-05-06 07:24:10,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 07:24:10,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-06 07:24:10,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 07:24:10,500 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:24:10,508 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 12 proven. 4 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-05-06 07:24:10,508 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 07:24:10,509 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [272949761] [2021-05-06 07:24:10,509 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 07:24:10,509 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1127335126] [2021-05-06 07:24:10,509 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1127335126] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 07:24:10,509 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 07:24:10,509 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-06 07:24:10,509 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1661494920] [2021-05-06 07:24:10,509 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-06 07:24:10,509 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 07:24:10,510 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-06 07:24:10,510 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-05-06 07:24:10,510 INFO L87 Difference]: Start difference. First operand 106 states and 125 transitions. Second operand has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 4 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2021-05-06 07:24:10,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 07:24:10,619 INFO L93 Difference]: Finished difference Result 132 states and 164 transitions. [2021-05-06 07:24:10,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-06 07:24:10,619 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 4 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 55 [2021-05-06 07:24:10,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 07:24:10,620 INFO L225 Difference]: With dead ends: 132 [2021-05-06 07:24:10,620 INFO L226 Difference]: Without dead ends: 131 [2021-05-06 07:24:10,620 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 27.7ms TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-05-06 07:24:10,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2021-05-06 07:24:10,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 127. [2021-05-06 07:24:10,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 79 states have (on average 1.1898734177215189) internal successors, (94), 82 states have internal predecessors, (94), 33 states have call successors, (33), 15 states have call predecessors, (33), 14 states have return successors, (31), 29 states have call predecessors, (31), 31 states have call successors, (31) [2021-05-06 07:24:10,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 158 transitions. [2021-05-06 07:24:10,624 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 158 transitions. Word has length 55 [2021-05-06 07:24:10,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 07:24:10,625 INFO L480 AbstractCegarLoop]: Abstraction has 127 states and 158 transitions. [2021-05-06 07:24:10,625 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 4 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2021-05-06 07:24:10,625 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 158 transitions. [2021-05-06 07:24:10,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-05-06 07:24:10,625 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 07:24:10,625 INFO L523 BasicCegarLoop]: trace histogram [7, 6, 6, 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, 1, 1, 1, 1, 1] [2021-05-06 07:24:10,840 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 07:24:10,841 INFO L428 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 07:24:10,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 07:24:10,841 INFO L82 PathProgramCache]: Analyzing trace with hash 1119467195, now seen corresponding path program 1 times [2021-05-06 07:24:10,842 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 07:24:10,842 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1138612710] [2021-05-06 07:24:10,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 07:24:10,848 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 07:24:10,848 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [796413035] [2021-05-06 07:24:10,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 07:24:10,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 07:24:10,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-06 07:24:10,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 07:24:10,903 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:24:10,904 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:24:10,906 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:24:10,916 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:24:10,917 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:24:10,917 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:24:10,934 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:24:10,937 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:24:10,937 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:24:10,966 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:24:10,968 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:24:10,978 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 14 proven. 34 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-05-06 07:24:10,978 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 07:24:10,978 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1138612710] [2021-05-06 07:24:10,979 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 07:24:10,979 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [796413035] [2021-05-06 07:24:10,979 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [796413035] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 07:24:10,979 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 07:24:10,979 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-06 07:24:10,979 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [608151867] [2021-05-06 07:24:10,979 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 07:24:10,979 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 07:24:10,979 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 07:24:10,979 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-06 07:24:10,980 INFO L87 Difference]: Start difference. First operand 127 states and 158 transitions. Second operand has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 5 states have internal predecessors, (28), 5 states have call successors, (10), 5 states have call predecessors, (10), 3 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) [2021-05-06 07:24:11,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 07:24:11,022 INFO L93 Difference]: Finished difference Result 130 states and 161 transitions. [2021-05-06 07:24:11,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-06 07:24:11,022 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 5 states have internal predecessors, (28), 5 states have call successors, (10), 5 states have call predecessors, (10), 3 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) Word has length 58 [2021-05-06 07:24:11,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 07:24:11,023 INFO L225 Difference]: With dead ends: 130 [2021-05-06 07:24:11,023 INFO L226 Difference]: Without dead ends: 130 [2021-05-06 07:24:11,024 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 13.2ms TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-05-06 07:24:11,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2021-05-06 07:24:11,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 130. [2021-05-06 07:24:11,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 82 states have (on average 1.1829268292682926) internal successors, (97), 84 states have internal predecessors, (97), 33 states have call successors, (33), 15 states have call predecessors, (33), 14 states have return successors, (31), 30 states have call predecessors, (31), 31 states have call successors, (31) [2021-05-06 07:24:11,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 161 transitions. [2021-05-06 07:24:11,032 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 161 transitions. Word has length 58 [2021-05-06 07:24:11,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 07:24:11,032 INFO L480 AbstractCegarLoop]: Abstraction has 130 states and 161 transitions. [2021-05-06 07:24:11,032 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 5 states have internal predecessors, (28), 5 states have call successors, (10), 5 states have call predecessors, (10), 3 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) [2021-05-06 07:24:11,032 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 161 transitions. [2021-05-06 07:24:11,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-05-06 07:24:11,035 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 07:24:11,035 INFO L523 BasicCegarLoop]: trace histogram [8, 7, 7, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 07:24:11,249 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 07:24:11,249 INFO L428 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 07:24:11,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 07:24:11,249 INFO L82 PathProgramCache]: Analyzing trace with hash -469414513, now seen corresponding path program 1 times [2021-05-06 07:24:11,250 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 07:24:11,250 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [623535607] [2021-05-06 07:24:11,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 07:24:11,262 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 07:24:11,262 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1062541172] [2021-05-06 07:24:11,262 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 [2021-05-06 07:24:11,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 07:24:11,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 4 conjunts are in the unsatisfiable core [2021-05-06 07:24:11,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 07:24:11,354 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:24:11,365 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:24:11,372 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:24:11,373 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:24:11,379 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:24:11,379 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:24:11,393 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:24:11,395 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:24:11,397 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:24:11,407 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:24:11,408 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:24:11,413 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:24:11,414 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:24:11,426 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-05-06 07:24:11,426 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 07:24:11,426 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [623535607] [2021-05-06 07:24:11,427 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 07:24:11,427 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1062541172] [2021-05-06 07:24:11,427 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1062541172] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 07:24:11,427 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 07:24:11,427 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 07:24:11,427 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1802979674] [2021-05-06 07:24:11,427 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 07:24:11,427 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 07:24:11,428 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 07:24:11,428 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-06 07:24:11,428 INFO L87 Difference]: Start difference. First operand 130 states and 161 transitions. Second operand has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 4 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-05-06 07:24:11,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 07:24:11,468 INFO L93 Difference]: Finished difference Result 129 states and 154 transitions. [2021-05-06 07:24:11,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 07:24:11,469 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 4 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 66 [2021-05-06 07:24:11,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 07:24:11,470 INFO L225 Difference]: With dead ends: 129 [2021-05-06 07:24:11,470 INFO L226 Difference]: Without dead ends: 119 [2021-05-06 07:24:11,470 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 12.6ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-06 07:24:11,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2021-05-06 07:24:11,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 112. [2021-05-06 07:24:11,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 72 states have (on average 1.1527777777777777) internal successors, (83), 74 states have internal predecessors, (83), 26 states have call successors, (26), 14 states have call predecessors, (26), 13 states have return successors, (24), 23 states have call predecessors, (24), 24 states have call successors, (24) [2021-05-06 07:24:11,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 133 transitions. [2021-05-06 07:24:11,473 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 133 transitions. Word has length 66 [2021-05-06 07:24:11,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 07:24:11,473 INFO L480 AbstractCegarLoop]: Abstraction has 112 states and 133 transitions. [2021-05-06 07:24:11,473 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 4 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-05-06 07:24:11,473 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 133 transitions. [2021-05-06 07:24:11,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-05-06 07:24:11,474 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 07:24:11,474 INFO L523 BasicCegarLoop]: trace histogram [10, 9, 9, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 07:24:11,693 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-05-06 07:24:11,693 INFO L428 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 07:24:11,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 07:24:11,693 INFO L82 PathProgramCache]: Analyzing trace with hash -1669598821, now seen corresponding path program 1 times [2021-05-06 07:24:11,694 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 07:24:11,694 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1943859840] [2021-05-06 07:24:11,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 07:24:11,699 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 07:24:11,699 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1309058427] [2021-05-06 07:24:11,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 07:24:11,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 07:24:11,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-06 07:24:11,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 07:24:11,758 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:24:11,760 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:24:11,760 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:24:11,769 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:24:11,771 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:24:11,773 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:24:11,792 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:24:11,794 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:24:11,795 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:24:11,825 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:24:11,827 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:24:11,832 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:24:11,854 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:24:11,856 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:24:11,863 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 18 proven. 112 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-05-06 07:24:11,864 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 07:24:11,864 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1943859840] [2021-05-06 07:24:11,864 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 07:24:11,864 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1309058427] [2021-05-06 07:24:11,864 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1309058427] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 07:24:11,864 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 07:24:11,864 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-06 07:24:11,864 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1636221447] [2021-05-06 07:24:11,864 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-06 07:24:11,864 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 07:24:11,865 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-06 07:24:11,865 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-05-06 07:24:11,865 INFO L87 Difference]: Start difference. First operand 112 states and 133 transitions. Second operand has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 6 states have internal predecessors, (32), 6 states have call successors, (13), 6 states have call predecessors, (13), 4 states have return successors, (11), 4 states have call predecessors, (11), 5 states have call successors, (11) [2021-05-06 07:24:11,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 07:24:11,912 INFO L93 Difference]: Finished difference Result 134 states and 157 transitions. [2021-05-06 07:24:11,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 07:24:11,912 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 6 states have internal predecessors, (32), 6 states have call successors, (13), 6 states have call predecessors, (13), 4 states have return successors, (11), 4 states have call predecessors, (11), 5 states have call successors, (11) Word has length 74 [2021-05-06 07:24:11,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 07:24:11,913 INFO L225 Difference]: With dead ends: 134 [2021-05-06 07:24:11,913 INFO L226 Difference]: Without dead ends: 134 [2021-05-06 07:24:11,913 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 16.9ms TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-06 07:24:11,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2021-05-06 07:24:11,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 132. [2021-05-06 07:24:11,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 85 states have (on average 1.1411764705882352) internal successors, (97), 88 states have internal predecessors, (97), 30 states have call successors, (30), 17 states have call predecessors, (30), 16 states have return successors, (28), 26 states have call predecessors, (28), 28 states have call successors, (28) [2021-05-06 07:24:11,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 155 transitions. [2021-05-06 07:24:11,918 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 155 transitions. Word has length 74 [2021-05-06 07:24:11,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 07:24:11,918 INFO L480 AbstractCegarLoop]: Abstraction has 132 states and 155 transitions. [2021-05-06 07:24:11,918 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 6 states have internal predecessors, (32), 6 states have call successors, (13), 6 states have call predecessors, (13), 4 states have return successors, (11), 4 states have call predecessors, (11), 5 states have call successors, (11) [2021-05-06 07:24:11,918 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 155 transitions. [2021-05-06 07:24:11,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-05-06 07:24:11,918 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 07:24:11,919 INFO L523 BasicCegarLoop]: trace histogram [11, 10, 10, 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] [2021-05-06 07:24:12,128 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-05-06 07:24:12,129 INFO L428 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 07:24:12,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 07:24:12,129 INFO L82 PathProgramCache]: Analyzing trace with hash -286098381, now seen corresponding path program 1 times [2021-05-06 07:24:12,129 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 07:24:12,129 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [251874204] [2021-05-06 07:24:12,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 07:24:12,135 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 07:24:12,136 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [366012947] [2021-05-06 07:24:12,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 07:24:12,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 07:24:12,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 24 conjunts are in the unsatisfiable core [2021-05-06 07:24:12,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 07:24:12,571 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:24:12,574 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:24:12,579 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:24:12,580 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:24:12,601 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:24:12,602 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:24:12,609 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:24:12,610 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:24:12,618 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:24:12,619 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:24:12,629 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:24:12,630 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:24:12,662 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:24:12,662 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:24:12,690 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:24:12,691 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:24:12,699 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:24:12,701 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:24:12,727 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:24:12,728 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:24:12,735 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:24:12,736 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:24:12,744 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:24:12,754 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 20 proven. 10 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2021-05-06 07:24:12,754 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 07:24:12,754 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [251874204] [2021-05-06 07:24:12,755 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 07:24:12,755 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [366012947] [2021-05-06 07:24:12,755 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [366012947] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 07:24:12,755 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 07:24:12,755 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-06 07:24:12,755 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430234601] [2021-05-06 07:24:12,755 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-06 07:24:12,755 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 07:24:12,756 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-06 07:24:12,756 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-05-06 07:24:12,756 INFO L87 Difference]: Start difference. First operand 132 states and 155 transitions. Second operand has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 9 states have internal predecessors, (26), 5 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 6 states have call predecessors, (12), 5 states have call successors, (12) [2021-05-06 07:24:12,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 07:24:12,970 INFO L93 Difference]: Finished difference Result 163 states and 198 transitions. [2021-05-06 07:24:12,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-06 07:24:12,970 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), 5 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 6 states have call predecessors, (12), 5 states have call successors, (12) Word has length 79 [2021-05-06 07:24:12,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 07:24:12,972 INFO L225 Difference]: With dead ends: 163 [2021-05-06 07:24:12,972 INFO L226 Difference]: Without dead ends: 162 [2021-05-06 07:24:12,973 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 62.2ms TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-05-06 07:24:12,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2021-05-06 07:24:12,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 157. [2021-05-06 07:24:12,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 99 states have (on average 1.1616161616161615) internal successors, (115), 102 states have internal predecessors, (115), 39 states have call successors, (39), 19 states have call predecessors, (39), 18 states have return successors, (37), 35 states have call predecessors, (37), 37 states have call successors, (37) [2021-05-06 07:24:12,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 191 transitions. [2021-05-06 07:24:12,985 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 191 transitions. Word has length 79 [2021-05-06 07:24:12,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 07:24:12,986 INFO L480 AbstractCegarLoop]: Abstraction has 157 states and 191 transitions. [2021-05-06 07:24:12,986 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), 5 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 6 states have call predecessors, (12), 5 states have call successors, (12) [2021-05-06 07:24:12,986 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 191 transitions. [2021-05-06 07:24:12,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-05-06 07:24:12,986 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 07:24:12,986 INFO L523 BasicCegarLoop]: trace histogram [11, 10, 10, 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, 1, 1, 1, 1] [2021-05-06 07:24:13,196 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-05-06 07:24:13,197 INFO L428 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 07:24:13,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 07:24:13,197 INFO L82 PathProgramCache]: Analyzing trace with hash -792688430, now seen corresponding path program 2 times [2021-05-06 07:24:13,197 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 07:24:13,197 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1563726321] [2021-05-06 07:24:13,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 07:24:13,203 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 07:24:13,203 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [287578788] [2021-05-06 07:24:13,203 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 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 07:24:13,255 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 07:24:13,256 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 07:24:13,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-06 07:24:13,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 07:24:13,265 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:24:13,266 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:24:13,266 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:24:13,276 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:24:13,277 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:24:13,278 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:24:13,302 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:24:13,304 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:24:13,304 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:24:13,357 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:24:13,360 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:24:13,361 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:24:13,392 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:24:13,393 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:24:13,405 INFO L134 CoverageAnalysis]: Checked inductivity of 214 backedges. 22 proven. 140 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2021-05-06 07:24:13,405 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 07:24:13,406 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1563726321] [2021-05-06 07:24:13,406 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 07:24:13,406 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [287578788] [2021-05-06 07:24:13,406 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [287578788] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 07:24:13,406 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 07:24:13,406 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-06 07:24:13,406 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [959908921] [2021-05-06 07:24:13,406 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-06 07:24:13,406 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 07:24:13,406 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-06 07:24:13,407 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-05-06 07:24:13,407 INFO L87 Difference]: Start difference. First operand 157 states and 191 transitions. Second operand has 7 states, 7 states have (on average 5.0) internal successors, (35), 6 states have internal predecessors, (35), 6 states have call successors, (14), 6 states have call predecessors, (14), 4 states have return successors, (12), 4 states have call predecessors, (12), 5 states have call successors, (12) [2021-05-06 07:24:13,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 07:24:13,469 INFO L93 Difference]: Finished difference Result 160 states and 194 transitions. [2021-05-06 07:24:13,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-06 07:24:13,470 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.0) internal successors, (35), 6 states have internal predecessors, (35), 6 states have call successors, (14), 6 states have call predecessors, (14), 4 states have return successors, (12), 4 states have call predecessors, (12), 5 states have call successors, (12) Word has length 82 [2021-05-06 07:24:13,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 07:24:13,470 INFO L225 Difference]: With dead ends: 160 [2021-05-06 07:24:13,470 INFO L226 Difference]: Without dead ends: 160 [2021-05-06 07:24:13,472 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 26.4ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-05-06 07:24:13,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2021-05-06 07:24:13,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 160. [2021-05-06 07:24:13,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 102 states have (on average 1.1568627450980393) internal successors, (118), 104 states have internal predecessors, (118), 39 states have call successors, (39), 19 states have call predecessors, (39), 18 states have return successors, (37), 36 states have call predecessors, (37), 37 states have call successors, (37) [2021-05-06 07:24:13,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 194 transitions. [2021-05-06 07:24:13,484 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 194 transitions. Word has length 82 [2021-05-06 07:24:13,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 07:24:13,485 INFO L480 AbstractCegarLoop]: Abstraction has 160 states and 194 transitions. [2021-05-06 07:24:13,485 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 5.0) internal successors, (35), 6 states have internal predecessors, (35), 6 states have call successors, (14), 6 states have call predecessors, (14), 4 states have return successors, (12), 4 states have call predecessors, (12), 5 states have call successors, (12) [2021-05-06 07:24:13,485 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 194 transitions. [2021-05-06 07:24:13,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-05-06 07:24:13,486 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 07:24:13,486 INFO L523 BasicCegarLoop]: trace histogram [12, 11, 11, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 07:24:13,697 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 07:24:13,697 INFO L428 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 07:24:13,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 07:24:13,697 INFO L82 PathProgramCache]: Analyzing trace with hash -2126505818, now seen corresponding path program 1 times [2021-05-06 07:24:13,697 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 07:24:13,697 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1758413571] [2021-05-06 07:24:13,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 07:24:13,702 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 07:24:13,702 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [90719108] [2021-05-06 07:24:13,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 07:24:13,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 07:24:13,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-06 07:24:13,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 07:24:13,777 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:24:13,779 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:24:13,779 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:24:13,788 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:24:13,789 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:24:13,790 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:24:13,805 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:24:13,806 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:24:13,807 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:24:13,836 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:24:13,837 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:24:13,837 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:24:13,875 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:24:13,876 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:24:13,876 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:24:13,894 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:24:13,895 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:24:13,906 INFO L134 CoverageAnalysis]: Checked inductivity of 262 backedges. 27 proven. 191 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2021-05-06 07:24:13,906 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 07:24:13,906 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1758413571] [2021-05-06 07:24:13,906 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 07:24:13,906 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [90719108] [2021-05-06 07:24:13,906 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [90719108] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 07:24:13,906 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 07:24:13,906 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-06 07:24:13,906 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [119681749] [2021-05-06 07:24:13,907 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 07:24:13,907 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 07:24:13,907 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 07:24:13,907 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-06 07:24:13,907 INFO L87 Difference]: Start difference. First operand 160 states and 194 transitions. Second operand has 8 states, 8 states have (on average 5.125) internal successors, (41), 7 states have internal predecessors, (41), 7 states have call successors, (15), 7 states have call predecessors, (15), 5 states have return successors, (13), 5 states have call predecessors, (13), 6 states have call successors, (13) [2021-05-06 07:24:13,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 07:24:13,999 INFO L93 Difference]: Finished difference Result 186 states and 220 transitions. [2021-05-06 07:24:14,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-06 07:24:14,005 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.125) internal successors, (41), 7 states have internal predecessors, (41), 7 states have call successors, (15), 7 states have call predecessors, (15), 5 states have return successors, (13), 5 states have call predecessors, (13), 6 states have call successors, (13) Word has length 90 [2021-05-06 07:24:14,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 07:24:14,006 INFO L225 Difference]: With dead ends: 186 [2021-05-06 07:24:14,006 INFO L226 Difference]: Without dead ends: 186 [2021-05-06 07:24:14,006 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 42.8ms TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-05-06 07:24:14,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2021-05-06 07:24:14,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 184. [2021-05-06 07:24:14,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 118 states have (on average 1.1355932203389831) internal successors, (134), 120 states have internal predecessors, (134), 43 states have call successors, (43), 23 states have call predecessors, (43), 22 states have return successors, (41), 40 states have call predecessors, (41), 41 states have call successors, (41) [2021-05-06 07:24:14,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 218 transitions. [2021-05-06 07:24:14,012 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 218 transitions. Word has length 90 [2021-05-06 07:24:14,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 07:24:14,013 INFO L480 AbstractCegarLoop]: Abstraction has 184 states and 218 transitions. [2021-05-06 07:24:14,013 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 5.125) internal successors, (41), 7 states have internal predecessors, (41), 7 states have call successors, (15), 7 states have call predecessors, (15), 5 states have return successors, (13), 5 states have call predecessors, (13), 6 states have call successors, (13) [2021-05-06 07:24:14,013 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 218 transitions. [2021-05-06 07:24:14,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-05-06 07:24:14,014 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 07:24:14,014 INFO L523 BasicCegarLoop]: trace histogram [14, 13, 13, 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, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 07:24:14,224 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-05-06 07:24:14,225 INFO L428 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 07:24:14,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 07:24:14,225 INFO L82 PathProgramCache]: Analyzing trace with hash -169757262, now seen corresponding path program 2 times [2021-05-06 07:24:14,225 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 07:24:14,225 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [40486551] [2021-05-06 07:24:14,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 07:24:14,231 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 07:24:14,231 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1111465302] [2021-05-06 07:24:14,231 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 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 07:24:14,293 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 07:24:14,293 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 07:24:14,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-06 07:24:14,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 07:24:14,303 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:24:14,304 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:24:14,305 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:24:14,315 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:24:14,316 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:24:14,317 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:24:14,332 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:24:14,333 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:24:14,333 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:24:14,363 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:24:14,366 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:24:14,366 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:24:14,392 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:24:14,393 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:24:14,394 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:24:14,416 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:24:14,417 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:24:14,425 INFO L134 CoverageAnalysis]: Checked inductivity of 360 backedges. 26 proven. 270 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2021-05-06 07:24:14,426 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 07:24:14,426 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [40486551] [2021-05-06 07:24:14,426 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 07:24:14,426 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1111465302] [2021-05-06 07:24:14,426 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1111465302] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 07:24:14,426 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 07:24:14,426 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-06 07:24:14,426 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [777546256] [2021-05-06 07:24:14,426 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 07:24:14,426 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 07:24:14,427 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 07:24:14,427 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-06 07:24:14,427 INFO L87 Difference]: Start difference. First operand 184 states and 218 transitions. Second operand has 8 states, 8 states have (on average 4.875) internal successors, (39), 7 states have internal predecessors, (39), 7 states have call successors, (17), 7 states have call predecessors, (17), 5 states have return successors, (15), 5 states have call predecessors, (15), 6 states have call successors, (15) [2021-05-06 07:24:14,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 07:24:14,500 INFO L93 Difference]: Finished difference Result 187 states and 221 transitions. [2021-05-06 07:24:14,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-06 07:24:14,500 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.875) internal successors, (39), 7 states have internal predecessors, (39), 7 states have call successors, (17), 7 states have call predecessors, (17), 5 states have return successors, (15), 5 states have call predecessors, (15), 6 states have call successors, (15) Word has length 98 [2021-05-06 07:24:14,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 07:24:14,501 INFO L225 Difference]: With dead ends: 187 [2021-05-06 07:24:14,501 INFO L226 Difference]: Without dead ends: 187 [2021-05-06 07:24:14,502 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 24.9ms TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-05-06 07:24:14,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2021-05-06 07:24:14,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 187. [2021-05-06 07:24:14,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 121 states have (on average 1.1322314049586777) internal successors, (137), 123 states have internal predecessors, (137), 43 states have call successors, (43), 23 states have call predecessors, (43), 22 states have return successors, (41), 40 states have call predecessors, (41), 41 states have call successors, (41) [2021-05-06 07:24:14,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 221 transitions. [2021-05-06 07:24:14,507 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 221 transitions. Word has length 98 [2021-05-06 07:24:14,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 07:24:14,507 INFO L480 AbstractCegarLoop]: Abstraction has 187 states and 221 transitions. [2021-05-06 07:24:14,507 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.875) internal successors, (39), 7 states have internal predecessors, (39), 7 states have call successors, (17), 7 states have call predecessors, (17), 5 states have return successors, (15), 5 states have call predecessors, (15), 6 states have call successors, (15) [2021-05-06 07:24:14,507 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 221 transitions. [2021-05-06 07:24:14,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-05-06 07:24:14,508 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 07:24:14,508 INFO L523 BasicCegarLoop]: trace histogram [15, 14, 14, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-05-06 07:24:14,720 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-05-06 07:24:14,721 INFO L428 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 07:24:14,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 07:24:14,721 INFO L82 PathProgramCache]: Analyzing trace with hash 1237757564, now seen corresponding path program 2 times [2021-05-06 07:24:14,721 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 07:24:14,721 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2063374622] [2021-05-06 07:24:14,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 07:24:14,726 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 07:24:14,726 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [681317021] [2021-05-06 07:24:14,726 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 07:24:14,786 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 07:24:14,786 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 07:24:14,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-06 07:24:14,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 07:24:14,982 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:24:14,989 INFO L134 CoverageAnalysis]: Checked inductivity of 416 backedges. 28 proven. 24 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2021-05-06 07:24:14,990 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 07:24:14,990 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2063374622] [2021-05-06 07:24:14,990 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 07:24:14,990 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [681317021] [2021-05-06 07:24:14,990 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [681317021] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 07:24:14,990 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 07:24:14,990 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-06 07:24:14,990 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1876492196] [2021-05-06 07:24:14,990 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-06 07:24:14,991 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 07:24:14,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-06 07:24:14,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-05-06 07:24:14,991 INFO L87 Difference]: Start difference. First operand 187 states and 221 transitions. Second operand has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 8 states have internal predecessors, (30), 6 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) [2021-05-06 07:24:15,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 07:24:15,171 INFO L93 Difference]: Finished difference Result 217 states and 263 transitions. [2021-05-06 07:24:15,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-06 07:24:15,172 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 8 states have internal predecessors, (30), 6 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) Word has length 103 [2021-05-06 07:24:15,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 07:24:15,173 INFO L225 Difference]: With dead ends: 217 [2021-05-06 07:24:15,173 INFO L226 Difference]: Without dead ends: 216 [2021-05-06 07:24:15,173 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 43.4ms TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-05-06 07:24:15,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2021-05-06 07:24:15,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 212. [2021-05-06 07:24:15,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 135 states have (on average 1.1481481481481481) internal successors, (155), 137 states have internal predecessors, (155), 52 states have call successors, (52), 25 states have call predecessors, (52), 24 states have return successors, (50), 49 states have call predecessors, (50), 50 states have call successors, (50) [2021-05-06 07:24:15,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 257 transitions. [2021-05-06 07:24:15,179 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 257 transitions. Word has length 103 [2021-05-06 07:24:15,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 07:24:15,180 INFO L480 AbstractCegarLoop]: Abstraction has 212 states and 257 transitions. [2021-05-06 07:24:15,180 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 8 states have internal predecessors, (30), 6 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) [2021-05-06 07:24:15,180 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 257 transitions. [2021-05-06 07:24:15,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-05-06 07:24:15,180 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 07:24:15,181 INFO L523 BasicCegarLoop]: trace histogram [15, 14, 14, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 07:24:15,392 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-05-06 07:24:15,393 INFO L428 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 07:24:15,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 07:24:15,393 INFO L82 PathProgramCache]: Analyzing trace with hash 2014256518, now seen corresponding path program 3 times [2021-05-06 07:24:15,393 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 07:24:15,393 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1997448356] [2021-05-06 07:24:15,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 07:24:15,398 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 07:24:15,399 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1685405783] [2021-05-06 07:24:15,399 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 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 07:24:15,454 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-05-06 07:24:15,455 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 07:24:15,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 33 conjunts are in the unsatisfiable core [2021-05-06 07:24:15,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 07:24:15,631 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:24:15,633 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:24:15,647 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:24:15,656 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 86 proven. 36 refuted. 0 times theorem prover too weak. 298 trivial. 0 not checked. [2021-05-06 07:24:15,656 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 07:24:15,656 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1997448356] [2021-05-06 07:24:15,657 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 07:24:15,657 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1685405783] [2021-05-06 07:24:15,657 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1685405783] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 07:24:15,657 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 07:24:15,657 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-06 07:24:15,657 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030025771] [2021-05-06 07:24:15,657 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-06 07:24:15,657 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 07:24:15,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-06 07:24:15,658 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-05-06 07:24:15,658 INFO L87 Difference]: Start difference. First operand 212 states and 257 transitions. Second operand has 10 states, 10 states have (on average 3.4) internal successors, (34), 9 states have internal predecessors, (34), 5 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 4 states have call predecessors, (13), 5 states have call successors, (13) [2021-05-06 07:24:15,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 07:24:15,912 INFO L93 Difference]: Finished difference Result 234 states and 287 transitions. [2021-05-06 07:24:15,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-06 07:24:15,912 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.4) internal successors, (34), 9 states have internal predecessors, (34), 5 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 4 states have call predecessors, (13), 5 states have call successors, (13) Word has length 106 [2021-05-06 07:24:15,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 07:24:15,916 INFO L225 Difference]: With dead ends: 234 [2021-05-06 07:24:15,916 INFO L226 Difference]: Without dead ends: 225 [2021-05-06 07:24:15,916 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 96 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 88.5ms TimeCoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2021-05-06 07:24:15,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2021-05-06 07:24:15,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 194. [2021-05-06 07:24:15,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 126 states have (on average 1.0952380952380953) internal successors, (138), 129 states have internal predecessors, (138), 43 states have call successors, (43), 25 states have call predecessors, (43), 24 states have return successors, (41), 39 states have call predecessors, (41), 41 states have call successors, (41) [2021-05-06 07:24:15,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 222 transitions. [2021-05-06 07:24:15,924 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 222 transitions. Word has length 106 [2021-05-06 07:24:15,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 07:24:15,925 INFO L480 AbstractCegarLoop]: Abstraction has 194 states and 222 transitions. [2021-05-06 07:24:15,925 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.4) internal successors, (34), 9 states have internal predecessors, (34), 5 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 4 states have call predecessors, (13), 5 states have call successors, (13) [2021-05-06 07:24:15,925 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 222 transitions. [2021-05-06 07:24:15,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2021-05-06 07:24:15,925 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 07:24:15,926 INFO L523 BasicCegarLoop]: trace histogram [16, 15, 15, 4, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-05-06 07:24:16,132 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 07:24:16,133 INFO L428 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 07:24:16,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 07:24:16,133 INFO L82 PathProgramCache]: Analyzing trace with hash 46832061, now seen corresponding path program 2 times [2021-05-06 07:24:16,133 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 07:24:16,133 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1377030138] [2021-05-06 07:24:16,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 07:24:16,138 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 07:24:16,138 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [212684138] [2021-05-06 07:24:16,138 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 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 07:24:16,204 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 07:24:16,205 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 07:24:16,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 6 conjunts are in the unsatisfiable core [2021-05-06 07:24:16,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 07:24:16,234 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:24:16,235 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:24:16,241 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:24:16,242 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:24:16,248 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:24:16,249 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:24:16,256 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:24:16,256 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:24:16,266 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:24:16,267 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:24:16,278 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:24:16,279 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:24:16,280 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:24:16,281 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:24:16,289 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:24:16,289 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:24:16,290 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:24:16,291 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:24:16,298 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:24:16,299 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:24:16,300 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:24:16,300 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:24:16,315 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:24:16,319 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:24:16,330 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:24:16,330 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:24:16,331 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:24:16,332 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:24:16,339 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:24:16,340 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:24:16,341 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:24:16,341 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:24:16,350 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:24:16,360 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:24:16,361 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:24:16,361 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:24:16,362 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:24:16,369 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:24:16,369 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:24:16,370 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:24:16,371 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:24:16,378 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:24:16,378 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:24:16,379 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:24:16,380 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:24:16,387 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:24:16,400 INFO L134 CoverageAnalysis]: Checked inductivity of 486 backedges. 102 proven. 18 refuted. 0 times theorem prover too weak. 366 trivial. 0 not checked. [2021-05-06 07:24:16,401 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 07:24:16,401 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1377030138] [2021-05-06 07:24:16,401 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 07:24:16,401 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [212684138] [2021-05-06 07:24:16,401 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [212684138] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 07:24:16,401 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 07:24:16,401 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-06 07:24:16,401 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647133687] [2021-05-06 07:24:16,401 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-06 07:24:16,401 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 07:24:16,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-06 07:24:16,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-06 07:24:16,402 INFO L87 Difference]: Start difference. First operand 194 states and 222 transitions. Second operand has 7 states, 7 states have (on average 5.428571428571429) internal successors, (38), 7 states have internal predecessors, (38), 6 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 6 states have call predecessors, (17), 6 states have call successors, (17) [2021-05-06 07:24:16,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 07:24:16,512 INFO L93 Difference]: Finished difference Result 226 states and 266 transitions. [2021-05-06 07:24:16,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-06 07:24:16,513 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.428571428571429) internal successors, (38), 7 states have internal predecessors, (38), 6 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 6 states have call predecessors, (17), 6 states have call successors, (17) Word has length 114 [2021-05-06 07:24:16,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 07:24:16,514 INFO L225 Difference]: With dead ends: 226 [2021-05-06 07:24:16,514 INFO L226 Difference]: Without dead ends: 193 [2021-05-06 07:24:16,514 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 47.9ms TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-05-06 07:24:16,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2021-05-06 07:24:16,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 179. [2021-05-06 07:24:16,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 116 states have (on average 1.103448275862069) internal successors, (128), 120 states have internal predecessors, (128), 40 states have call successors, (40), 23 states have call predecessors, (40), 22 states have return successors, (37), 35 states have call predecessors, (37), 37 states have call successors, (37) [2021-05-06 07:24:16,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 205 transitions. [2021-05-06 07:24:16,518 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 205 transitions. Word has length 114 [2021-05-06 07:24:16,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 07:24:16,519 INFO L480 AbstractCegarLoop]: Abstraction has 179 states and 205 transitions. [2021-05-06 07:24:16,519 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 5.428571428571429) internal successors, (38), 7 states have internal predecessors, (38), 6 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 6 states have call predecessors, (17), 6 states have call successors, (17) [2021-05-06 07:24:16,519 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 205 transitions. [2021-05-06 07:24:16,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2021-05-06 07:24:16,519 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 07:24:16,520 INFO L523 BasicCegarLoop]: trace histogram [18, 17, 17, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 07:24:16,728 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 07:24:16,729 INFO L428 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 07:24:16,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 07:24:16,729 INFO L82 PathProgramCache]: Analyzing trace with hash -1953340215, now seen corresponding path program 4 times [2021-05-06 07:24:16,729 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 07:24:16,729 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [771858061] [2021-05-06 07:24:16,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 07:24:16,734 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 07:24:16,734 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [67537500] [2021-05-06 07:24:16,734 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 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 07:24:16,789 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-06 07:24:16,789 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 07:24:16,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 38 conjunts are in the unsatisfiable core [2021-05-06 07:24:16,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 07:24:16,835 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:24:16,836 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:24:16,865 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:24:16,866 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:24:16,875 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:24:16,876 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:24:16,886 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:24:16,887 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:24:16,953 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:24:16,955 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:24:16,970 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:24:16,972 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:24:16,990 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:24:16,992 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:24:17,009 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:24:17,012 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:24:17,062 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:24:17,064 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:24:17,104 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:24:17,108 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:24:17,137 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:24:17,142 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:24:17,279 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:24:17,295 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:24:17,417 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:24:17,425 WARN L159 QuantifierPusher]: Ignoring assumption.