/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/ps6-ll_unwindbound5.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-6253b08 [2021-05-06 10:42:25,526 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-06 10:42:25,528 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-06 10:42:25,559 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-05-06 10:42:25,559 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-05-06 10:42:25,562 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-05-06 10:42:25,564 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-05-06 10:42:25,568 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-05-06 10:42:25,570 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-05-06 10:42:25,573 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-05-06 10:42:25,574 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-05-06 10:42:25,575 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-05-06 10:42:25,575 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-06 10:42:25,577 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-06 10:42:25,578 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-06 10:42:25,579 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-06 10:42:25,581 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-06 10:42:25,581 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-06 10:42:25,583 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-06 10:42:25,588 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-06 10:42:25,589 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-06 10:42:25,590 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-06 10:42:25,591 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-06 10:42:25,593 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-06 10:42:25,596 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-06 10:42:25,602 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-06 10:42:25,602 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-06 10:42:25,602 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-06 10:42:25,603 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2021-05-06 10:42:25,616 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-06 10:42:25,616 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-06 10:42:25,619 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-06 10:42:25,619 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-06 10:42:25,619 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-06 10:42:25,619 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-06 10:42:25,619 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-06 10:42:25,619 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-06 10:42:25,619 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-06 10:42:25,620 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-06 10:42:25,620 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-06 10:42:25,621 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-06 10:42:25,621 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-06 10:42:25,621 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-06 10:42:25,621 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-06 10:42:25,621 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-06 10:42:25,621 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-06 10:42:25,621 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-06 10:42:25,621 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 10:42:25,621 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-06 10:42:25,621 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-06 10:42:25,622 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-05-06 10:42:25,622 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-06 10:42:25,915 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-06 10:42:25,943 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-06 10:42:25,945 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-06 10:42:25,946 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-06 10:42:25,947 INFO L275 PluginConnector]: CDTParser initialized [2021-05-06 10:42:25,947 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/ps6-ll_unwindbound5.c [2021-05-06 10:42:26,003 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9bbaaf5da/ffe58870041c45b4a7557a0d339818a9/FLAG459ab6840 [2021-05-06 10:42:26,400 INFO L306 CDTParser]: Found 1 translation units. [2021-05-06 10:42:26,400 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/ps6-ll_unwindbound5.c [2021-05-06 10:42:26,405 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9bbaaf5da/ffe58870041c45b4a7557a0d339818a9/FLAG459ab6840 [2021-05-06 10:42:26,420 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9bbaaf5da/ffe58870041c45b4a7557a0d339818a9 [2021-05-06 10:42:26,422 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-06 10:42:26,423 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-05-06 10:42:26,427 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-06 10:42:26,427 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-06 10:42:26,430 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-06 10:42:26,431 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 10:42:26" (1/1) ... [2021-05-06 10:42:26,431 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@71029708 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 10:42:26, skipping insertion in model container [2021-05-06 10:42:26,431 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 10:42:26" (1/1) ... [2021-05-06 10:42:26,436 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-06 10:42:26,447 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-06 10:42:26,572 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/ps6-ll_unwindbound5.c[458,471] [2021-05-06 10:42:26,594 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 10:42:26,600 INFO L203 MainTranslator]: Completed pre-run [2021-05-06 10:42:26,615 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/ps6-ll_unwindbound5.c[458,471] [2021-05-06 10:42:26,640 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 10:42:26,649 INFO L208 MainTranslator]: Completed translation [2021-05-06 10:42:26,649 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 10:42:26 WrapperNode [2021-05-06 10:42:26,649 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-06 10:42:26,650 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-06 10:42:26,650 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-06 10:42:26,650 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-06 10:42:26,659 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 10:42:26" (1/1) ... [2021-05-06 10:42:26,659 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 10:42:26" (1/1) ... [2021-05-06 10:42:26,665 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 10:42:26" (1/1) ... [2021-05-06 10:42:26,665 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 10:42:26" (1/1) ... [2021-05-06 10:42:26,674 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 10:42:26" (1/1) ... [2021-05-06 10:42:26,677 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 10:42:26" (1/1) ... [2021-05-06 10:42:26,681 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 10:42:26" (1/1) ... [2021-05-06 10:42:26,686 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-06 10:42:26,687 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-06 10:42:26,688 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-06 10:42:26,688 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-06 10:42:26,688 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 10:42:26" (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 10:42:26,749 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-06 10:42:26,749 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-06 10:42:26,749 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-06 10:42:26,749 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-06 10:42:26,749 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-06 10:42:26,749 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-06 10:42:26,749 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-06 10:42:26,750 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-06 10:42:26,750 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-06 10:42:26,750 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-06 10:42:26,750 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_short [2021-05-06 10:42:26,750 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-06 10:42:26,750 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-06 10:42:26,751 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-06 10:42:26,751 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-06 10:42:26,751 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-06 10:42:26,751 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-06 10:42:26,751 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-06 10:42:26,752 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-06 10:42:26,752 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-06 10:42:26,987 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-06 10:42:26,987 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-06 10:42:26,988 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 10:42:26 BoogieIcfgContainer [2021-05-06 10:42:26,988 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-06 10:42:26,989 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2021-05-06 10:42:26,989 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2021-05-06 10:42:26,989 INFO L275 PluginConnector]: IcfgTransformer initialized [2021-05-06 10:42:26,991 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 10:42:26" (1/1) ... [2021-05-06 10:42:27,000 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.05 10:42:27 BasicIcfg [2021-05-06 10:42:27,001 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2021-05-06 10:42:27,001 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-06 10:42:27,002 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-06 10:42:27,003 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-06 10:42:27,003 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.05 10:42:26" (1/4) ... [2021-05-06 10:42:27,004 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@cb4f5c0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 10:42:27, skipping insertion in model container [2021-05-06 10:42:27,004 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 10:42:26" (2/4) ... [2021-05-06 10:42:27,004 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@cb4f5c0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 10:42:27, skipping insertion in model container [2021-05-06 10:42:27,021 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 10:42:26" (3/4) ... [2021-05-06 10:42:27,021 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@cb4f5c0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.05 10:42:27, skipping insertion in model container [2021-05-06 10:42:27,021 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.05 10:42:27" (4/4) ... [2021-05-06 10:42:27,022 INFO L111 eAbstractionObserver]: Analyzing ICFG ps6-ll_unwindbound5.cJordan [2021-05-06 10:42:27,026 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2021-05-06 10:42:27,028 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-06 10:42:27,055 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-06 10:42:27,067 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-06 10:42:27,068 INFO L377 AbstractCegarLoop]: Hoare is false [2021-05-06 10:42:27,068 INFO L378 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2021-05-06 10:42:27,068 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-06 10:42:27,068 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-06 10:42:27,068 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-06 10:42:27,068 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-06 10:42:27,068 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-06 10:42:27,098 INFO L276 IsEmpty]: Start isEmpty. Operand has 29 states, 17 states have (on average 1.3529411764705883) internal successors, (23), 18 states have internal predecessors, (23), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-06 10:42:27,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-06 10:42:27,103 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 10:42:27,103 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 10:42:27,104 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 10:42:27,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 10:42:27,119 INFO L82 PathProgramCache]: Analyzing trace with hash 843387237, now seen corresponding path program 1 times [2021-05-06 10:42:27,124 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 10:42:27,124 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1781205656] [2021-05-06 10:42:27,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 10:42:27,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 10:42:27,313 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 10:42:27,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 10:42:27,334 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-06 10:42:27,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 10:42:27,345 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 10:42:27,346 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 10:42:27,346 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1781205656] [2021-05-06 10:42:27,347 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1781205656] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 10:42:27,347 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 10:42:27,347 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-06 10:42:27,348 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1867239822] [2021-05-06 10:42:27,351 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-06 10:42:27,351 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 10:42:27,360 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-06 10:42:27,360 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 10:42:27,363 INFO L87 Difference]: Start difference. First operand has 29 states, 17 states have (on average 1.3529411764705883) internal successors, (23), 18 states have internal predecessors, (23), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) 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 10:42:27,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 10:42:27,478 INFO L93 Difference]: Finished difference Result 30 states and 33 transitions. [2021-05-06 10:42:27,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-06 10:42:27,480 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 10:42:27,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 10:42:27,484 INFO L225 Difference]: With dead ends: 30 [2021-05-06 10:42:27,484 INFO L226 Difference]: Without dead ends: 25 [2021-05-06 10:42:27,485 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 42.2ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 10:42:27,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-05-06 10:42:27,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2021-05-06 10:42:27,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 15 states have internal predecessors, (17), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-06 10:42:27,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2021-05-06 10:42:27,505 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 17 [2021-05-06 10:42:27,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 10:42:27,505 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2021-05-06 10:42:27,505 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 10:42:27,506 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2021-05-06 10:42:27,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-06 10:42:27,506 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 10:42:27,506 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 10:42:27,506 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-06 10:42:27,506 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 10:42:27,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 10:42:27,507 INFO L82 PathProgramCache]: Analyzing trace with hash 208087835, now seen corresponding path program 1 times [2021-05-06 10:42:27,507 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 10:42:27,507 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1586302994] [2021-05-06 10:42:27,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 10:42:27,517 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 10:42:27,518 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [976678498] [2021-05-06 10:42:27,518 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 10:42:27,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 10:42:27,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-06 10:42:27,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 10:42:27,617 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:42:27,622 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:42:27,624 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:42:27,648 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:42:27,650 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:42:27,664 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 10:42:27,664 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 10:42:27,665 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1586302994] [2021-05-06 10:42:27,665 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 10:42:27,665 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [976678498] [2021-05-06 10:42:27,667 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [976678498] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 10:42:27,667 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 10:42:27,667 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-06 10:42:27,667 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1108296248] [2021-05-06 10:42:27,668 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-06 10:42:27,668 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 10:42:27,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-06 10:42:27,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-06 10:42:27,669 INFO L87 Difference]: Start difference. First operand 24 states and 27 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 10:42:27,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 10:42:27,677 INFO L93 Difference]: Finished difference Result 26 states and 29 transitions. [2021-05-06 10:42:27,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-06 10:42:27,678 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 10:42:27,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 10:42:27,678 INFO L225 Difference]: With dead ends: 26 [2021-05-06 10:42:27,679 INFO L226 Difference]: Without dead ends: 26 [2021-05-06 10:42:27,679 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.2ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-06 10:42:27,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-05-06 10:42:27,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2021-05-06 10:42:27,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 16 states have (on average 1.1875) internal successors, (19), 17 states have internal predecessors, (19), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-06 10:42:27,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 29 transitions. [2021-05-06 10:42:27,683 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 29 transitions. Word has length 18 [2021-05-06 10:42:27,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 10:42:27,683 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 29 transitions. [2021-05-06 10:42:27,683 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 10:42:27,683 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 29 transitions. [2021-05-06 10:42:27,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-06 10:42:27,683 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 10:42:27,684 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 10:42:27,901 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-06 10:42:27,902 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 10:42:27,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 10:42:27,902 INFO L82 PathProgramCache]: Analyzing trace with hash 209190102, now seen corresponding path program 1 times [2021-05-06 10:42:27,902 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 10:42:27,902 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [619426128] [2021-05-06 10:42:27,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 10:42:27,913 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 10:42:27,914 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [744678751] [2021-05-06 10:42:27,914 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 10:42:27,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 10:42:27,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-06 10:42:27,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 10:42:27,996 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:42:28,004 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 10:42:28,005 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 10:42:28,005 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [619426128] [2021-05-06 10:42:28,005 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 10:42:28,005 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [744678751] [2021-05-06 10:42:28,005 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [744678751] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 10:42:28,005 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 10:42:28,005 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 10:42:28,006 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965906944] [2021-05-06 10:42:28,006 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 10:42:28,006 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 10:42:28,006 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 10:42:28,006 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-06 10:42:28,007 INFO L87 Difference]: Start difference. First operand 26 states and 29 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-06 10:42:28,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 10:42:28,100 INFO L93 Difference]: Finished difference Result 34 states and 39 transitions. [2021-05-06 10:42:28,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-06 10:42:28,100 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 18 [2021-05-06 10:42:28,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 10:42:28,103 INFO L225 Difference]: With dead ends: 34 [2021-05-06 10:42:28,103 INFO L226 Difference]: Without dead ends: 32 [2021-05-06 10:42:28,103 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 15.5ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-06 10:42:28,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-05-06 10:42:28,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2021-05-06 10:42:28,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 20 states have (on average 1.15) internal successors, (23), 21 states have internal predecessors, (23), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-06 10:42:28,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 35 transitions. [2021-05-06 10:42:28,109 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 35 transitions. Word has length 18 [2021-05-06 10:42:28,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 10:42:28,109 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 35 transitions. [2021-05-06 10:42:28,109 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-06 10:42:28,109 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 35 transitions. [2021-05-06 10:42:28,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-06 10:42:28,110 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 10:42:28,110 INFO L523 BasicCegarLoop]: trace histogram [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 10:42:28,325 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 10:42:28,325 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 10:42:28,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 10:42:28,326 INFO L82 PathProgramCache]: Analyzing trace with hash -1223799235, now seen corresponding path program 1 times [2021-05-06 10:42:28,326 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 10:42:28,326 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [506532429] [2021-05-06 10:42:28,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 10:42:28,336 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 10:42:28,336 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1340372876] [2021-05-06 10:42:28,336 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 10:42:28,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 10:42:28,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-06 10:42:28,403 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 10:42:28,418 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:42:28,426 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:42:28,427 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:42:28,441 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:42:28,443 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:42:28,444 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:42:28,460 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:42:28,462 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:42:28,472 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 10:42:28,472 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 10:42:28,472 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [506532429] [2021-05-06 10:42:28,473 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 10:42:28,473 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1340372876] [2021-05-06 10:42:28,473 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1340372876] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 10:42:28,473 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 10:42:28,473 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-05-06 10:42:28,473 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1624259624] [2021-05-06 10:42:28,473 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 10:42:28,473 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 10:42:28,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 10:42:28,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-06 10:42:28,474 INFO L87 Difference]: Start difference. First operand 32 states and 35 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 4 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-06 10:42:28,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 10:42:28,495 INFO L93 Difference]: Finished difference Result 34 states and 37 transitions. [2021-05-06 10:42:28,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 10:42:28,496 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 4 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 26 [2021-05-06 10:42:28,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 10:42:28,496 INFO L225 Difference]: With dead ends: 34 [2021-05-06 10:42:28,497 INFO L226 Difference]: Without dead ends: 34 [2021-05-06 10:42:28,501 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 11.3ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-06 10:42:28,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-05-06 10:42:28,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2021-05-06 10:42:28,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 23 states have internal predecessors, (25), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-06 10:42:28,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 37 transitions. [2021-05-06 10:42:28,504 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 37 transitions. Word has length 26 [2021-05-06 10:42:28,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 10:42:28,504 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 37 transitions. [2021-05-06 10:42:28,504 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 4 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-06 10:42:28,504 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 37 transitions. [2021-05-06 10:42:28,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-06 10:42:28,505 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 10:42:28,505 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 10:42:28,727 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 10:42:28,727 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 10:42:28,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 10:42:28,728 INFO L82 PathProgramCache]: Analyzing trace with hash -1222696968, now seen corresponding path program 1 times [2021-05-06 10:42:28,728 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 10:42:28,728 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [237494730] [2021-05-06 10:42:28,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 10:42:28,735 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 10:42:28,735 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [96017286] [2021-05-06 10:42:28,735 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 10:42:28,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 10:42:28,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-06 10:42:28,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 10:42:28,893 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:42:28,900 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 10:42:28,901 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 10:42:28,901 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [237494730] [2021-05-06 10:42:28,901 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 10:42:28,901 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [96017286] [2021-05-06 10:42:28,901 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [96017286] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 10:42:28,901 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 10:42:28,901 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-06 10:42:28,901 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1331647434] [2021-05-06 10:42:28,902 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 10:42:28,902 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 10:42:28,902 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 10:42:28,902 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-06 10:42:28,902 INFO L87 Difference]: Start difference. First operand 34 states and 37 transitions. Second operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 10:42:28,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 10:42:28,958 INFO L93 Difference]: Finished difference Result 42 states and 47 transitions. [2021-05-06 10:42:28,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 10:42:28,958 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 26 [2021-05-06 10:42:28,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 10:42:28,959 INFO L225 Difference]: With dead ends: 42 [2021-05-06 10:42:28,959 INFO L226 Difference]: Without dead ends: 42 [2021-05-06 10:42:28,959 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 20.2ms TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-06 10:42:28,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-05-06 10:42:28,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 41. [2021-05-06 10:42:28,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 26 states have (on average 1.1538461538461537) internal successors, (30), 28 states have internal predecessors, (30), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-06 10:42:28,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 46 transitions. [2021-05-06 10:42:28,963 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 46 transitions. Word has length 26 [2021-05-06 10:42:28,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 10:42:28,963 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 46 transitions. [2021-05-06 10:42:28,963 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 10:42:28,963 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 46 transitions. [2021-05-06 10:42:28,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-05-06 10:42:28,964 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 10:42:28,964 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 10:42:29,182 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 10:42:29,184 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 10:42:29,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 10:42:29,185 INFO L82 PathProgramCache]: Analyzing trace with hash -688312481, now seen corresponding path program 2 times [2021-05-06 10:42:29,185 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 10:42:29,185 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1231224376] [2021-05-06 10:42:29,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 10:42:29,192 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 10:42:29,193 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1295817760] [2021-05-06 10:42:29,193 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 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 10:42:29,242 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 10:42:29,242 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 10:42:29,243 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-06 10:42:29,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 10:42:29,254 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:42:29,257 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:42:29,259 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:42:29,276 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:42:29,278 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:42:29,279 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:42:29,292 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:42:29,294 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:42:29,295 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:42:29,309 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:42:29,310 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:42:29,319 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 10:42:29,319 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 10:42:29,319 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1231224376] [2021-05-06 10:42:29,320 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 10:42:29,320 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1295817760] [2021-05-06 10:42:29,320 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1295817760] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 10:42:29,333 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 10:42:29,333 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-06 10:42:29,336 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750847371] [2021-05-06 10:42:29,336 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 10:42:29,336 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 10:42:29,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 10:42:29,336 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-06 10:42:29,337 INFO L87 Difference]: Start difference. First operand 41 states and 46 transitions. Second operand has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 5 states have call successors, (6), 5 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-06 10:42:29,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 10:42:29,534 INFO L93 Difference]: Finished difference Result 50 states and 54 transitions. [2021-05-06 10:42:29,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 10:42:29,536 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 5 states have call successors, (6), 5 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) Word has length 34 [2021-05-06 10:42:29,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 10:42:29,536 INFO L225 Difference]: With dead ends: 50 [2021-05-06 10:42:29,536 INFO L226 Difference]: Without dead ends: 48 [2021-05-06 10:42:29,537 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 18.9ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-05-06 10:42:29,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-05-06 10:42:29,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 46. [2021-05-06 10:42:29,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 30 states have (on average 1.1333333333333333) internal successors, (34), 31 states have internal predecessors, (34), 10 states have call successors, (10), 7 states have call predecessors, (10), 5 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-06 10:42:29,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 51 transitions. [2021-05-06 10:42:29,541 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 51 transitions. Word has length 34 [2021-05-06 10:42:29,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 10:42:29,541 INFO L480 AbstractCegarLoop]: Abstraction has 46 states and 51 transitions. [2021-05-06 10:42:29,541 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 5 states have call successors, (6), 5 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-06 10:42:29,541 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 51 transitions. [2021-05-06 10:42:29,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-05-06 10:42:29,542 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 10:42:29,542 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 10:42:29,745 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-05-06 10:42:29,745 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 10:42:29,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 10:42:29,746 INFO L82 PathProgramCache]: Analyzing trace with hash -687210214, now seen corresponding path program 2 times [2021-05-06 10:42:29,746 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 10:42:29,746 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [925171393] [2021-05-06 10:42:29,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 10:42:29,775 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 10:42:29,775 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [87837970] [2021-05-06 10:42:29,775 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 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 10:42:29,883 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 10:42:29,884 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 10:42:29,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-06 10:42:29,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 10:42:30,005 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:42:30,017 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 10:42:30,017 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 10:42:30,017 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [925171393] [2021-05-06 10:42:30,017 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 10:42:30,017 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [87837970] [2021-05-06 10:42:30,017 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [87837970] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 10:42:30,018 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 10:42:30,018 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-06 10:42:30,018 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746989709] [2021-05-06 10:42:30,018 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-06 10:42:30,018 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 10:42:30,018 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-06 10:42:30,018 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-05-06 10:42:30,019 INFO L87 Difference]: Start difference. First operand 46 states and 51 transitions. Second operand has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 4 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-06 10:42:30,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 10:42:30,089 INFO L93 Difference]: Finished difference Result 54 states and 61 transitions. [2021-05-06 10:42:30,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-06 10:42:30,090 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 4 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 34 [2021-05-06 10:42:30,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 10:42:30,091 INFO L225 Difference]: With dead ends: 54 [2021-05-06 10:42:30,091 INFO L226 Difference]: Without dead ends: 54 [2021-05-06 10:42:30,091 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 42.4ms TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-05-06 10:42:30,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-05-06 10:42:30,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 53. [2021-05-06 10:42:30,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 34 states have (on average 1.1470588235294117) internal successors, (39), 36 states have internal predecessors, (39), 12 states have call successors, (12), 8 states have call predecessors, (12), 6 states have return successors, (9), 8 states have call predecessors, (9), 9 states have call successors, (9) [2021-05-06 10:42:30,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 60 transitions. [2021-05-06 10:42:30,095 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 60 transitions. Word has length 34 [2021-05-06 10:42:30,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 10:42:30,096 INFO L480 AbstractCegarLoop]: Abstraction has 53 states and 60 transitions. [2021-05-06 10:42:30,096 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 4 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-06 10:42:30,096 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 60 transitions. [2021-05-06 10:42:30,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-05-06 10:42:30,097 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 10:42:30,097 INFO L523 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 10:42:30,303 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 10:42:30,304 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 10:42:30,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 10:42:30,304 INFO L82 PathProgramCache]: Analyzing trace with hash 96926796, now seen corresponding path program 1 times [2021-05-06 10:42:30,304 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 10:42:30,304 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1579122604] [2021-05-06 10:42:30,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 10:42:30,311 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 10:42:30,311 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [18017790] [2021-05-06 10:42:30,311 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 10:42:30,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 10:42:30,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-06 10:42:30,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 10:42:30,404 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:42:30,404 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:42:30,407 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:42:30,407 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:42:30,418 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:42:30,434 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:42:30,435 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:42:30,444 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:42:30,448 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:42:30,456 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:42:30,470 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:42:30,480 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-06 10:42:30,480 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 10:42:30,480 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1579122604] [2021-05-06 10:42:30,480 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 10:42:30,480 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [18017790] [2021-05-06 10:42:30,480 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [18017790] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 10:42:30,480 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 10:42:30,480 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-06 10:42:30,481 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [234212234] [2021-05-06 10:42:30,481 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-06 10:42:30,481 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 10:42:30,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-06 10:42:30,481 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-05-06 10:42:30,481 INFO L87 Difference]: Start difference. First operand 53 states and 60 transitions. Second operand has 7 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 4 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2021-05-06 10:42:30,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 10:42:30,528 INFO L93 Difference]: Finished difference Result 53 states and 59 transitions. [2021-05-06 10:42:30,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-06 10:42:30,528 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 4 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) Word has length 37 [2021-05-06 10:42:30,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 10:42:30,529 INFO L225 Difference]: With dead ends: 53 [2021-05-06 10:42:30,530 INFO L226 Difference]: Without dead ends: 49 [2021-05-06 10:42:30,530 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 40.0ms TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-05-06 10:42:30,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-05-06 10:42:30,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2021-05-06 10:42:30,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 32 states have (on average 1.125) internal successors, (36), 34 states have internal predecessors, (36), 10 states have call successors, (10), 7 states have call predecessors, (10), 6 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-06 10:42:30,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 54 transitions. [2021-05-06 10:42:30,534 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 54 transitions. Word has length 37 [2021-05-06 10:42:30,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 10:42:30,534 INFO L480 AbstractCegarLoop]: Abstraction has 49 states and 54 transitions. [2021-05-06 10:42:30,534 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 4 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2021-05-06 10:42:30,534 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 54 transitions. [2021-05-06 10:42:30,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-05-06 10:42:30,535 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 10:42:30,535 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 10:42:30,753 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 10:42:30,753 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 10:42:30,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 10:42:30,753 INFO L82 PathProgramCache]: Analyzing trace with hash 1133104769, now seen corresponding path program 3 times [2021-05-06 10:42:30,753 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 10:42:30,753 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1267466395] [2021-05-06 10:42:30,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 10:42:30,760 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 10:42:30,760 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1345950153] [2021-05-06 10:42:30,760 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 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 10:42:32,092 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-06 10:42:32,093 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 10:42:32,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-06 10:42:32,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 10:42:32,193 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:42:32,209 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:42:32,222 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:42:32,232 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 19 proven. 1 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-05-06 10:42:32,232 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 10:42:32,232 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1267466395] [2021-05-06 10:42:32,232 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 10:42:32,232 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1345950153] [2021-05-06 10:42:32,232 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1345950153] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 10:42:32,232 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 10:42:32,232 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-06 10:42:32,232 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1470765355] [2021-05-06 10:42:32,233 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-06 10:42:32,233 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 10:42:32,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-06 10:42:32,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-05-06 10:42:32,233 INFO L87 Difference]: Start difference. First operand 49 states and 54 transitions. Second operand has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2021-05-06 10:42:32,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 10:42:32,278 INFO L93 Difference]: Finished difference Result 53 states and 57 transitions. [2021-05-06 10:42:32,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-06 10:42:32,278 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), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 42 [2021-05-06 10:42:32,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 10:42:32,279 INFO L225 Difference]: With dead ends: 53 [2021-05-06 10:42:32,279 INFO L226 Difference]: Without dead ends: 51 [2021-05-06 10:42:32,279 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 31.6ms TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-05-06 10:42:32,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-05-06 10:42:32,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 44. [2021-05-06 10:42:32,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 30 states have (on average 1.0666666666666667) internal successors, (32), 30 states have internal predecessors, (32), 8 states have call successors, (8), 7 states have call predecessors, (8), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-06 10:42:32,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 46 transitions. [2021-05-06 10:42:32,282 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 46 transitions. Word has length 42 [2021-05-06 10:42:32,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 10:42:32,282 INFO L480 AbstractCegarLoop]: Abstraction has 44 states and 46 transitions. [2021-05-06 10:42:32,282 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), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2021-05-06 10:42:32,282 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 46 transitions. [2021-05-06 10:42:32,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-05-06 10:42:32,283 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 10:42:32,283 INFO L523 BasicCegarLoop]: trace histogram [5, 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] [2021-05-06 10:42:32,489 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-05-06 10:42:32,490 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 10:42:32,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 10:42:32,490 INFO L82 PathProgramCache]: Analyzing trace with hash -678596118, now seen corresponding path program 2 times [2021-05-06 10:42:32,490 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 10:42:32,490 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [339853021] [2021-05-06 10:42:32,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 10:42:32,496 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 10:42:32,496 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1797539428] [2021-05-06 10:42:32,496 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 10:42:32,666 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 10:42:32,667 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 10:42:32,668 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 24 conjunts are in the unsatisfiable core [2021-05-06 10:42:32,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 10:42:32,698 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:42:32,699 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:42:32,708 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:42:32,712 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:42:32,727 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:42:32,728 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:42:32,740 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:42:32,743 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:42:32,764 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:42:32,765 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:42:32,766 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:42:32,766 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:42:32,769 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:42:32,770 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:42:32,780 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:42:32,794 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:42:32,795 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:42:32,796 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:42:32,797 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:42:32,816 WARN L159 QuantifierPusher]: Ignoring assumption.