/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/geo3-ll_unwindbound50.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 20:51:56,751 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 20:51:56,752 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 20:51:56,771 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-05-02 20:51:56,771 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-05-02 20:51:56,772 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-05-02 20:51:56,773 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-05-02 20:51:56,774 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-05-02 20:51:56,775 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-05-02 20:51:56,776 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-05-02 20:51:56,777 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-05-02 20:51:56,778 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-05-02 20:51:56,778 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-02 20:51:56,779 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-02 20:51:56,779 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-02 20:51:56,780 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-02 20:51:56,781 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-02 20:51:56,781 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-02 20:51:56,782 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-02 20:51:56,783 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-02 20:51:56,784 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-02 20:51:56,789 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-02 20:51:56,790 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-02 20:51:56,790 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-02 20:51:56,792 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-02 20:51:56,797 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 20:51:56,798 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 20:51:56,798 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 20:51:56,804 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2021-05-02 20:51:56,817 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 20:51:56,817 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 20:51:56,819 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 20:51:56,820 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 20:51:56,820 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 20:51:56,820 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 20:51:56,820 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 20:51:56,820 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 20:51:56,820 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 20:51:56,821 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 20:51:56,821 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 20:51:56,821 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 20:51:56,821 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 20:51:56,821 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 20:51:56,822 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 20:51:56,822 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 20:51:56,822 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-02 20:51:56,822 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 20:51:56,822 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 20:51:56,822 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 20:51:56,822 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-02 20:51:56,823 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-05-02 20:51:56,823 INFO L138 SettingsManager]: * TransformationType=LOOP_ACCELERATION_JORDAN WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 20:51:57,093 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 20:51:57,110 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 20:51:57,111 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 20:51:57,112 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 20:51:57,113 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 20:51:57,114 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/geo3-ll_unwindbound50.c [2021-05-02 20:51:57,156 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/739183246/d9abacc7cd9b43ed8ce9ab9ba595823f/FLAG8aaaa7ae4 [2021-05-02 20:51:57,485 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 20:51:57,485 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/geo3-ll_unwindbound50.c [2021-05-02 20:51:57,489 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/739183246/d9abacc7cd9b43ed8ce9ab9ba595823f/FLAG8aaaa7ae4 [2021-05-02 20:51:57,925 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/739183246/d9abacc7cd9b43ed8ce9ab9ba595823f [2021-05-02 20:51:57,926 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 20:51:57,928 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-05-02 20:51:57,931 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 20:51:57,932 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 20:51:57,934 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 20:51:57,934 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 08:51:57" (1/1) ... [2021-05-02 20:51:57,935 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7ea98de5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:51:57, skipping insertion in model container [2021-05-02 20:51:57,935 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 08:51:57" (1/1) ... [2021-05-02 20:51:57,941 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 20:51:57,951 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 20:51:58,055 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/geo3-ll_unwindbound50.c[525,538] [2021-05-02 20:51:58,067 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 20:51:58,072 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 20:51:58,089 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/geo3-ll_unwindbound50.c[525,538] [2021-05-02 20:51:58,096 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 20:51:58,113 INFO L208 MainTranslator]: Completed translation [2021-05-02 20:51:58,113 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:51:58 WrapperNode [2021-05-02 20:51:58,113 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 20:51:58,114 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 20:51:58,114 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 20:51:58,114 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 20:51:58,127 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:51:58" (1/1) ... [2021-05-02 20:51:58,128 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:51:58" (1/1) ... [2021-05-02 20:51:58,132 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:51:58" (1/1) ... [2021-05-02 20:51:58,132 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:51:58" (1/1) ... [2021-05-02 20:51:58,141 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:51:58" (1/1) ... [2021-05-02 20:51:58,148 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:51:58" (1/1) ... [2021-05-02 20:51:58,151 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:51:58" (1/1) ... [2021-05-02 20:51:58,155 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 20:51:58,156 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 20:51:58,156 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 20:51:58,156 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 20:51:58,156 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:51:58" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 20:51:58,220 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 20:51:58,221 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 20:51:58,221 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 20:51:58,221 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-02 20:51:58,221 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 20:51:58,221 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 20:51:58,221 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 20:51:58,222 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 20:51:58,222 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 20:51:58,222 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 20:51:58,222 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-02 20:51:58,222 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-02 20:51:58,222 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 20:51:58,223 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 20:51:58,223 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 20:51:58,223 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 20:51:58,223 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 20:51:58,223 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 20:51:58,224 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 20:51:58,224 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 20:51:58,427 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 20:51:58,427 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-02 20:51:58,428 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 08:51:58 BoogieIcfgContainer [2021-05-02 20:51:58,428 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 20:51:58,429 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2021-05-02 20:51:58,429 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2021-05-02 20:51:58,429 INFO L275 PluginConnector]: IcfgTransformer initialized [2021-05-02 20:51:58,431 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 08:51:58" (1/1) ... [2021-05-02 20:51:58,441 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 02.05 08:51:58 BasicIcfg [2021-05-02 20:51:58,441 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2021-05-02 20:51:58,442 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 20:51:58,442 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 20:51:58,444 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 20:51:58,444 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 08:51:57" (1/4) ... [2021-05-02 20:51:58,445 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@31d0e217 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 08:51:58, skipping insertion in model container [2021-05-02 20:51:58,445 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:51:58" (2/4) ... [2021-05-02 20:51:58,445 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@31d0e217 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 08:51:58, skipping insertion in model container [2021-05-02 20:51:58,445 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 08:51:58" (3/4) ... [2021-05-02 20:51:58,445 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@31d0e217 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 08:51:58, skipping insertion in model container [2021-05-02 20:51:58,445 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 02.05 08:51:58" (4/4) ... [2021-05-02 20:51:58,446 INFO L111 eAbstractionObserver]: Analyzing ICFG geo3-ll_unwindbound50.cJordan [2021-05-02 20:51:58,449 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2021-05-02 20:51:58,452 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 20:51:58,462 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 20:51:58,474 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 20:51:58,474 INFO L377 AbstractCegarLoop]: Hoare is false [2021-05-02 20:51:58,474 INFO L378 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2021-05-02 20:51:58,474 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 20:51:58,474 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 20:51:58,474 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 20:51:58,474 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 20:51:58,474 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 20:51:58,482 INFO L276 IsEmpty]: Start isEmpty. Operand has 22 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 14 states have internal predecessors, (18), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-02 20:51:58,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-05-02 20:51:58,487 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:51:58,487 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:51:58,487 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:51:58,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:51:58,491 INFO L82 PathProgramCache]: Analyzing trace with hash -630084848, now seen corresponding path program 1 times [2021-05-02 20:51:58,496 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:51:58,496 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [99347263] [2021-05-02 20:51:58,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:51:58,564 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:51:58,564 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1351525681] [2021-05-02 20:51:58,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:51:58,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:51:58,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 1 conjunts are in the unsatisfiable core [2021-05-02 20:51:58,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:51:58,693 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 20:51:58,693 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:51:58,693 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [99347263] [2021-05-02 20:51:58,693 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:51:58,693 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1351525681] [2021-05-02 20:51:58,694 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1351525681] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 20:51:58,694 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 20:51:58,694 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-05-02 20:51:58,694 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1617003435] [2021-05-02 20:51:58,697 INFO L460 AbstractCegarLoop]: Interpolant automaton has 2 states [2021-05-02 20:51:58,697 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:51:58,704 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-05-02 20:51:58,708 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-05-02 20:51:58,710 INFO L87 Difference]: Start difference. First operand has 22 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 14 states have internal predecessors, (18), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 20:51:58,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:51:58,718 INFO L93 Difference]: Finished difference Result 22 states and 24 transitions. [2021-05-02 20:51:58,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-05-02 20:51:58,718 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2021-05-02 20:51:58,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:51:58,722 INFO L225 Difference]: With dead ends: 22 [2021-05-02 20:51:58,723 INFO L226 Difference]: Without dead ends: 17 [2021-05-02 20:51:58,723 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0ms TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-05-02 20:51:58,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2021-05-02 20:51:58,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2021-05-02 20:51:58,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 10 states have (on average 1.3) internal successors, (13), 11 states have internal predecessors, (13), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 20:51:58,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2021-05-02 20:51:58,742 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 11 [2021-05-02 20:51:58,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:51:58,742 INFO L480 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2021-05-02 20:51:58,742 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 20:51:58,742 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2021-05-02 20:51:58,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-05-02 20:51:58,743 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:51:58,743 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:51:58,957 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2021-05-02 20:51:58,958 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:51:58,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:51:58,959 INFO L82 PathProgramCache]: Analyzing trace with hash 1971636769, now seen corresponding path program 1 times [2021-05-02 20:51:58,959 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:51:58,959 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2137673580] [2021-05-02 20:51:58,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:51:58,986 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:51:58,986 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1889776383] [2021-05-02 20:51:58,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:51:59,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:51:59,040 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-02 20:51:59,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:51:59,069 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:51:59,076 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:51:59,078 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:51:59,090 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:51:59,093 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:51:59,107 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 20:51:59,107 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:51:59,107 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2137673580] [2021-05-02 20:51:59,107 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:51:59,107 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1889776383] [2021-05-02 20:51:59,107 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1889776383] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 20:51:59,107 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 20:51:59,107 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-02 20:51:59,108 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1327980827] [2021-05-02 20:51:59,108 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-02 20:51:59,108 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:51:59,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-02 20:51:59,109 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-02 20:51:59,109 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 20:51:59,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:51:59,118 INFO L93 Difference]: Finished difference Result 19 states and 21 transitions. [2021-05-02 20:51:59,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-02 20:51:59,118 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2021-05-02 20:51:59,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:51:59,119 INFO L225 Difference]: With dead ends: 19 [2021-05-02 20:51:59,119 INFO L226 Difference]: Without dead ends: 19 [2021-05-02 20:51:59,119 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.4ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-02 20:51:59,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2021-05-02 20:51:59,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2021-05-02 20:51:59,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 12 states have (on average 1.25) internal successors, (15), 13 states have internal predecessors, (15), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 20:51:59,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2021-05-02 20:51:59,122 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 12 [2021-05-02 20:51:59,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:51:59,122 INFO L480 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2021-05-02 20:51:59,122 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 20:51:59,122 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2021-05-02 20:51:59,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-05-02 20:51:59,123 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:51:59,123 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:51:59,341 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:51:59,341 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:51:59,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:51:59,342 INFO L82 PathProgramCache]: Analyzing trace with hash 1972709245, now seen corresponding path program 1 times [2021-05-02 20:51:59,342 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:51:59,342 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [580310437] [2021-05-02 20:51:59,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:51:59,360 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:51:59,361 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1028151534] [2021-05-02 20:51:59,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:51:59,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:51:59,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-02 20:51:59,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:51:59,443 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:51:59,445 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:51:59,460 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 20:51:59,460 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:51:59,460 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [580310437] [2021-05-02 20:51:59,460 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:51:59,460 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1028151534] [2021-05-02 20:51:59,460 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1028151534] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 20:51:59,460 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 20:51:59,460 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-02 20:51:59,461 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1087153823] [2021-05-02 20:51:59,461 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-02 20:51:59,461 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:51:59,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-02 20:51:59,461 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-02 20:51:59,462 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 20:51:59,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:51:59,487 INFO L93 Difference]: Finished difference Result 26 states and 29 transitions. [2021-05-02 20:51:59,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-02 20:51:59,488 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2021-05-02 20:51:59,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:51:59,488 INFO L225 Difference]: With dead ends: 26 [2021-05-02 20:51:59,489 INFO L226 Difference]: Without dead ends: 25 [2021-05-02 20:51:59,489 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 18.9ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-02 20:51:59,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-05-02 20:51:59,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2021-05-02 20:51:59,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 16 states have (on average 1.1875) internal successors, (19), 17 states have internal predecessors, (19), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 20:51:59,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2021-05-02 20:51:59,492 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 12 [2021-05-02 20:51:59,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:51:59,492 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2021-05-02 20:51:59,492 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 20:51:59,492 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2021-05-02 20:51:59,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-02 20:51:59,493 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:51:59,493 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:51:59,710 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:51:59,711 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:51:59,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:51:59,711 INFO L82 PathProgramCache]: Analyzing trace with hash -832305310, now seen corresponding path program 1 times [2021-05-02 20:51:59,711 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:51:59,711 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2062351553] [2021-05-02 20:51:59,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:51:59,720 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:51:59,720 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [980775712] [2021-05-02 20:51:59,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:51:59,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:51:59,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-02 20:51:59,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:51:59,796 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:51:59,804 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:51:59,808 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:51:59,825 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:51:59,831 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:51:59,834 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:51:59,868 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:51:59,870 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:51:59,885 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 20:51:59,885 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:51:59,885 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2062351553] [2021-05-02 20:51:59,885 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:51:59,885 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [980775712] [2021-05-02 20:51:59,886 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [980775712] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:51:59,886 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:51:59,886 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-05-02 20:51:59,886 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1065983256] [2021-05-02 20:51:59,886 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-02 20:51:59,886 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:51:59,886 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-02 20:51:59,887 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-02 20:51:59,887 INFO L87 Difference]: Start difference. First operand 25 states and 27 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 20:51:59,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:51:59,920 INFO L93 Difference]: Finished difference Result 27 states and 29 transitions. [2021-05-02 20:51:59,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-02 20:51:59,921 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 20 [2021-05-02 20:51:59,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:51:59,922 INFO L225 Difference]: With dead ends: 27 [2021-05-02 20:51:59,922 INFO L226 Difference]: Without dead ends: 27 [2021-05-02 20:51:59,924 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 13.6ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-02 20:51:59,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-05-02 20:51:59,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2021-05-02 20:51:59,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 19 states have internal predecessors, (21), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 20:51:59,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 29 transitions. [2021-05-02 20:51:59,932 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 29 transitions. Word has length 20 [2021-05-02 20:51:59,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:51:59,933 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 29 transitions. [2021-05-02 20:51:59,933 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 20:51:59,933 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 29 transitions. [2021-05-02 20:51:59,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-02 20:51:59,933 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:51:59,934 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:52:00,148 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:52:00,149 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:52:00,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:52:00,149 INFO L82 PathProgramCache]: Analyzing trace with hash -831232834, now seen corresponding path program 1 times [2021-05-02 20:52:00,149 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:52:00,150 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [414144962] [2021-05-02 20:52:00,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:52:00,156 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:52:00,157 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [394529170] [2021-05-02 20:52:00,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:52:00,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:52:00,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-02 20:52:00,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:52:00,305 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:00,306 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:00,329 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 20:52:00,329 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:52:00,329 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [414144962] [2021-05-02 20:52:00,334 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:52:00,334 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [394529170] [2021-05-02 20:52:00,334 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [394529170] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:52:00,334 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:52:00,334 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-02 20:52:00,334 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1754317306] [2021-05-02 20:52:00,335 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 20:52:00,335 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:52:00,335 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 20:52:00,335 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-05-02 20:52:00,336 INFO L87 Difference]: Start difference. First operand 27 states and 29 transitions. Second operand has 9 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 7 states have internal predecessors, (14), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 20:52:00,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:52:00,401 INFO L93 Difference]: Finished difference Result 34 states and 37 transitions. [2021-05-02 20:52:00,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 20:52:00,402 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 7 states have internal predecessors, (14), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 20 [2021-05-02 20:52:00,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:52:00,404 INFO L225 Difference]: With dead ends: 34 [2021-05-02 20:52:00,404 INFO L226 Difference]: Without dead ends: 33 [2021-05-02 20:52:00,405 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 58.7ms TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-05-02 20:52:00,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-05-02 20:52:00,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2021-05-02 20:52:00,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 23 states have internal predecessors, (25), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-02 20:52:00,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 35 transitions. [2021-05-02 20:52:00,413 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 35 transitions. Word has length 20 [2021-05-02 20:52:00,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:52:00,414 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 35 transitions. [2021-05-02 20:52:00,414 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 7 states have internal predecessors, (14), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 20:52:00,414 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 35 transitions. [2021-05-02 20:52:00,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-02 20:52:00,415 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:52:00,415 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:52:00,629 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:52:00,629 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:52:00,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:52:00,629 INFO L82 PathProgramCache]: Analyzing trace with hash -870943837, now seen corresponding path program 2 times [2021-05-02 20:52:00,629 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:52:00,629 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [285243537] [2021-05-02 20:52:00,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:52:00,637 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:52:00,637 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1842842357] [2021-05-02 20:52:00,637 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 [2021-05-02 20:52:00,676 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 20:52:00,677 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:52:00,677 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-02 20:52:00,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:52:00,688 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:00,690 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:00,691 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:00,696 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:00,699 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:00,702 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:00,718 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:00,720 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:00,723 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:00,742 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:00,744 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:00,757 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 20:52:00,757 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:52:00,757 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [285243537] [2021-05-02 20:52:00,757 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:52:00,758 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1842842357] [2021-05-02 20:52:00,758 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1842842357] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:52:00,758 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:52:00,758 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-02 20:52:00,758 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74812364] [2021-05-02 20:52:00,758 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 20:52:00,758 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:52:00,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 20:52:00,759 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-02 20:52:00,759 INFO L87 Difference]: Start difference. First operand 33 states and 35 transitions. Second operand has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 5 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 20:52:00,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:52:00,795 INFO L93 Difference]: Finished difference Result 35 states and 37 transitions. [2021-05-02 20:52:00,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 20:52:00,796 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 5 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 28 [2021-05-02 20:52:00,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:52:00,796 INFO L225 Difference]: With dead ends: 35 [2021-05-02 20:52:00,796 INFO L226 Difference]: Without dead ends: 35 [2021-05-02 20:52:00,796 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 19.0ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-05-02 20:52:00,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-05-02 20:52:00,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2021-05-02 20:52:00,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 24 states have (on average 1.125) internal successors, (27), 25 states have internal predecessors, (27), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-02 20:52:00,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 37 transitions. [2021-05-02 20:52:00,799 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 37 transitions. Word has length 28 [2021-05-02 20:52:00,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:52:00,799 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 37 transitions. [2021-05-02 20:52:00,799 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 5 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 20:52:00,799 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 37 transitions. [2021-05-02 20:52:00,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-02 20:52:00,800 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:52:00,800 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:52:01,012 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:52:01,015 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:52:01,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:52:01,015 INFO L82 PathProgramCache]: Analyzing trace with hash -869871361, now seen corresponding path program 2 times [2021-05-02 20:52:01,015 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:52:01,015 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1443629507] [2021-05-02 20:52:01,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:52:01,039 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:52:01,039 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1536958157] [2021-05-02 20:52:01,039 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 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:52:01,144 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 20:52:01,145 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:52:01,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 34 conjunts are in the unsatisfiable core [2021-05-02 20:52:01,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:52:01,269 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:01,271 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:01,297 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 20:52:01,297 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:52:01,297 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1443629507] [2021-05-02 20:52:01,297 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:52:01,298 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1536958157] [2021-05-02 20:52:01,298 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1536958157] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:52:01,298 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:52:01,298 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-02 20:52:01,298 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1737921928] [2021-05-02 20:52:01,298 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 20:52:01,298 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:52:01,299 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 20:52:01,299 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-05-02 20:52:01,299 INFO L87 Difference]: Start difference. First operand 35 states and 37 transitions. Second operand has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 8 states have internal predecessors, (17), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 20:52:12,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:52:12,549 INFO L93 Difference]: Finished difference Result 42 states and 45 transitions. [2021-05-02 20:52:12,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 20:52:12,550 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 8 states have internal predecessors, (17), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 28 [2021-05-02 20:52:12,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:52:12,551 INFO L225 Difference]: With dead ends: 42 [2021-05-02 20:52:12,551 INFO L226 Difference]: Without dead ends: 42 [2021-05-02 20:52:12,551 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 96.5ms TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-05-02 20:52:12,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-05-02 20:52:12,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 40. [2021-05-02 20:52:12,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 27 states have (on average 1.1111111111111112) internal successors, (30), 29 states have internal predecessors, (30), 7 states have call successors, (7), 6 states have call predecessors, (7), 5 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-02 20:52:12,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 42 transitions. [2021-05-02 20:52:12,555 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 42 transitions. Word has length 28 [2021-05-02 20:52:12,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:52:12,555 INFO L480 AbstractCegarLoop]: Abstraction has 40 states and 42 transitions. [2021-05-02 20:52:12,555 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 8 states have internal predecessors, (17), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 20:52:12,555 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 42 transitions. [2021-05-02 20:52:12,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-05-02 20:52:12,556 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:52:12,556 INFO L523 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:52:12,756 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:52:12,756 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:52:12,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:52:12,757 INFO L82 PathProgramCache]: Analyzing trace with hash -1187551519, now seen corresponding path program 1 times [2021-05-02 20:52:12,757 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:52:12,757 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [712989994] [2021-05-02 20:52:12,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:52:12,762 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:52:12,763 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [88868916] [2021-05-02 20:52:12,763 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 [2021-05-02 20:52:12,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:52:12,812 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-02 20:52:12,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:52:12,874 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:12,876 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:12,891 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 13 proven. 1 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-05-02 20:52:12,891 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:52:12,891 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [712989994] [2021-05-02 20:52:12,892 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:52:12,892 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [88868916] [2021-05-02 20:52:12,892 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [88868916] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:52:12,892 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:52:12,892 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-02 20:52:12,892 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1441083243] [2021-05-02 20:52:12,892 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-02 20:52:12,892 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:52:12,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-02 20:52:12,893 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-05-02 20:52:12,893 INFO L87 Difference]: Start difference. First operand 40 states and 42 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-05-02 20:52:14,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:52:14,945 INFO L93 Difference]: Finished difference Result 45 states and 46 transitions. [2021-05-02 20:52:14,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 20:52:14,945 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 34 [2021-05-02 20:52:14,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:52:14,947 INFO L225 Difference]: With dead ends: 45 [2021-05-02 20:52:14,947 INFO L226 Difference]: Without dead ends: 40 [2021-05-02 20:52:14,947 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 32.3ms TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-05-02 20:52:14,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-05-02 20:52:14,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2021-05-02 20:52:14,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 27 states have (on average 1.0740740740740742) internal successors, (29), 29 states have internal predecessors, (29), 7 states have call successors, (7), 6 states have call predecessors, (7), 5 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-02 20:52:14,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 41 transitions. [2021-05-02 20:52:14,950 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 41 transitions. Word has length 34 [2021-05-02 20:52:14,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:52:14,951 INFO L480 AbstractCegarLoop]: Abstraction has 40 states and 41 transitions. [2021-05-02 20:52:14,951 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-05-02 20:52:14,951 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 41 transitions. [2021-05-02 20:52:14,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-02 20:52:14,951 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:52:14,951 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:52:15,157 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-05-02 20:52:15,157 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:52:15,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:52:15,157 INFO L82 PathProgramCache]: Analyzing trace with hash 2080181988, now seen corresponding path program 3 times [2021-05-02 20:52:15,157 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:52:15,157 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1010416327] [2021-05-02 20:52:15,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:52:15,163 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:52:15,163 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [989875069] [2021-05-02 20:52:15,163 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 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:52:15,286 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-02 20:52:15,286 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:52:15,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-02 20:52:15,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:52:17,497 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:17,501 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:17,512 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:17,526 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:17,530 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:17,536 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:17,542 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:17,547 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:17,552 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:17,555 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:17,558 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:17,560 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:17,574 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:19,611 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:19,613 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:19,614 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:19,616 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:19,617 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:19,619 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:19,622 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:21,648 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:21,650 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:21,652 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:21,653 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:21,655 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:21,660 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:40,905 WARN L205 SmtUtils]: Spent 10.21 s on a formula simplification that was a NOOP. DAG size: 35 [2021-05-02 20:52:40,909 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:40,913 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:42,958 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:42,960 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:42,964 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:42,965 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:42,967 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:44,986 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:44,987 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:44,988 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:44,990 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:44,992 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:44,995 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:47,032 WARN L838 $PredicateComparison]: unable to prove that (or (= c___VERIFIER_assert_~cond 1) (and (= c___VERIFIER_assert_~cond 0) (exists ((v_main_~z~0_BEFORE_CALL_10 Int) (v_main_~y~0_BEFORE_CALL_8 Int) (v_main_~x~0_BEFORE_CALL_8 Int) (v_main_~a~0_BEFORE_CALL_11 Int)) (let ((.cse1 (+ v_main_~x~0_BEFORE_CALL_8 (* v_main_~a~0_BEFORE_CALL_11 (- 1))))) (and (let ((.cse0 (div .cse1 v_main_~z~0_BEFORE_CALL_10))) (= (+ (* v_main_~z~0_BEFORE_CALL_10 .cse0) v_main_~a~0_BEFORE_CALL_11) (+ (* (div v_main_~y~0_BEFORE_CALL_8 v_main_~z~0_BEFORE_CALL_10) v_main_~z~0_BEFORE_CALL_10 v_main_~a~0_BEFORE_CALL_11) .cse0))) (= (mod v_main_~y~0_BEFORE_CALL_8 v_main_~z~0_BEFORE_CALL_10) 0) (= (mod .cse1 v_main_~z~0_BEFORE_CALL_10) 0) (not (= v_main_~z~0_BEFORE_CALL_10 0)) (not (= (+ (* v_main_~z~0_BEFORE_CALL_10 v_main_~y~0_BEFORE_CALL_8 v_main_~a~0_BEFORE_CALL_11) v_main_~x~0_BEFORE_CALL_8) (+ (* v_main_~z~0_BEFORE_CALL_10 v_main_~x~0_BEFORE_CALL_8) v_main_~a~0_BEFORE_CALL_11)))))))) is different from false [2021-05-02 20:52:47,047 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:47,051 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:49,064 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:49,070 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:49,071 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:49,073 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:49,074 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:51,095 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:51,106 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:51,114 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:51,115 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:51,116 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:51,119 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:53,134 WARN L838 $PredicateComparison]: unable to prove that (exists ((v_main_~z~0_BEFORE_CALL_10 Int) (v_main_~y~0_BEFORE_CALL_8 Int) (v_main_~x~0_BEFORE_CALL_8 Int) (v_main_~a~0_BEFORE_CALL_11 Int)) (let ((.cse1 (+ v_main_~x~0_BEFORE_CALL_8 (* v_main_~a~0_BEFORE_CALL_11 (- 1))))) (and (let ((.cse0 (div .cse1 v_main_~z~0_BEFORE_CALL_10))) (= (+ (* v_main_~z~0_BEFORE_CALL_10 .cse0) v_main_~a~0_BEFORE_CALL_11) (+ (* (div v_main_~y~0_BEFORE_CALL_8 v_main_~z~0_BEFORE_CALL_10) v_main_~z~0_BEFORE_CALL_10 v_main_~a~0_BEFORE_CALL_11) .cse0))) (= (mod v_main_~y~0_BEFORE_CALL_8 v_main_~z~0_BEFORE_CALL_10) 0) (= (mod .cse1 v_main_~z~0_BEFORE_CALL_10) 0) (not (= v_main_~z~0_BEFORE_CALL_10 0)) (not (= (+ (* v_main_~z~0_BEFORE_CALL_10 v_main_~y~0_BEFORE_CALL_8 v_main_~a~0_BEFORE_CALL_11) v_main_~x~0_BEFORE_CALL_8) (+ (* v_main_~z~0_BEFORE_CALL_10 v_main_~x~0_BEFORE_CALL_8) v_main_~a~0_BEFORE_CALL_11)))))) is different from false [2021-05-02 20:52:53,138 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 1 not checked. [2021-05-02 20:52:53,138 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:52:53,138 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1010416327] [2021-05-02 20:52:53,138 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:52:53,138 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [989875069] [2021-05-02 20:52:53,138 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [989875069] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:52:53,139 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:52:53,139 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-02 20:52:53,139 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [80972036] [2021-05-02 20:52:53,139 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 20:52:53,139 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:52:53,139 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 20:52:53,139 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=38, Unknown=7, NotChecked=26, Total=90 [2021-05-02 20:52:53,140 INFO L87 Difference]: Start difference. First operand 40 states and 41 transitions. Second operand has 10 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 20:52:57,303 WARN L205 SmtUtils]: Spent 2.13 s on a formula simplification. DAG size of input: 37 DAG size of output: 3 [2021-05-02 20:53:05,548 WARN L205 SmtUtils]: Spent 8.13 s on a formula simplification. DAG size of input: 43 DAG size of output: 6 [2021-05-02 20:53:46,488 WARN L205 SmtUtils]: Spent 16.45 s on a formula simplification. DAG size of input: 34 DAG size of output: 31 [2021-05-02 20:55:17,710 WARN L205 SmtUtils]: Spent 1.21 m on a formula simplification. DAG size of input: 42 DAG size of output: 38 [2021-05-02 20:55:19,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:55:19,733 INFO L93 Difference]: Finished difference Result 45 states and 45 transitions. [2021-05-02 20:55:19,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-02 20:55:19,777 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 36 [2021-05-02 20:55:19,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:55:19,778 INFO L225 Difference]: With dead ends: 45 [2021-05-02 20:55:19,778 INFO L226 Difference]: Without dead ends: 39 [2021-05-02 20:55:19,778 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 143548.0ms TimeCoverageRelationStatistics Valid=44, Invalid=104, Unknown=16, NotChecked=46, Total=210 [2021-05-02 20:55:19,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-05-02 20:55:19,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2021-05-02 20:55:19,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 27 states have (on average 1.037037037037037) internal successors, (28), 28 states have internal predecessors, (28), 6 states have call successors, (6), 6 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-02 20:55:19,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 39 transitions. [2021-05-02 20:55:19,780 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 39 transitions. Word has length 36 [2021-05-02 20:55:19,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:55:19,780 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 39 transitions. [2021-05-02 20:55:19,780 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 20:55:19,781 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 39 transitions. [2021-05-02 20:55:19,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-02 20:55:19,781 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:55:19,781 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:55:19,981 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:55:19,982 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:55:19,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:55:19,982 INFO L82 PathProgramCache]: Analyzing trace with hash 2081254464, now seen corresponding path program 3 times [2021-05-02 20:55:19,982 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:55:19,982 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1948586727] [2021-05-02 20:55:19,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:55:19,991 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:55:19,992 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [512305528] [2021-05-02 20:55:19,992 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 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:55:20,100 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-02 20:55:20,100 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:55:20,101 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-02 20:55:20,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:55:22,829 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 38 [2021-05-02 20:55:22,871 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:22,889 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:22,897 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:22,903 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:22,919 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:22,923 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:22,925 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:22,927 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:22,945 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:22,948 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:22,950 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:22,953 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:22,959 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:22,961 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:22,963 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:22,969 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:22,988 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:22,993 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:22,998 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:23,000 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:23,003 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:23,011 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:23,015 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:23,016 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:23,017 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:23,022 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:23,023 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:23,024 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:23,026 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:23,029 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:23,036 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:23,039 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:23,040 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:23,043 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:23,044 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:23,046 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:23,049 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:23,054 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:23,058 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:23,060 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:23,062 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:23,063 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:23,065 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:23,068 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:23,070 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:23,076 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:23,080 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:25,093 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:25,099 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:25,102 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:25,103 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:25,114 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:25,115 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:25,118 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:25,120 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:25,121 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:25,125 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:25,130 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:25,131 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:25,133 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:25,136 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:25,138 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:25,139 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:25,141 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:25,145 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:29,261 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:29,264 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:29,274 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:29,275 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:29,277 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:29,278 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:29,280 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:31,351 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:31,366 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:31,368 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:31,369 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:31,370 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:31,386 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:31,387 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:33,423 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:33,425 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:33,426 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:33,428 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:33,429 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:33,430 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:33,432 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:35,527 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:35,528 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:35,530 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:35,531 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:35,532 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:35,534 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:35,535 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:37,665 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:37,668 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:37,670 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:37,672 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:37,673 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:37,674 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:37,676 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:37,679 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:52,276 WARN L205 SmtUtils]: Spent 12.21 s on a formula simplification that was a NOOP. DAG size: 37 [2021-05-02 20:55:52,279 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:52,283 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:54,355 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:54,358 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:54,363 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:54,364 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:54,365 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:54,366 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:54,368 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:56,383 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:56,384 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:56,385 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:56,386 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:56,387 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:56,388 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:56,389 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:56,392 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:58,525 WARN L838 $PredicateComparison]: unable to prove that (or (= c___VERIFIER_assert_~cond 1) (and (= c___VERIFIER_assert_~cond 0) (exists ((v_main_~a~0_BEFORE_CALL_15 Int) (v_main_~z~0_BEFORE_CALL_14 Int) (v_main_~x~0_BEFORE_CALL_9 Int)) (let ((.cse0 (+ (* v_main_~a~0_BEFORE_CALL_15 (- 1)) v_main_~x~0_BEFORE_CALL_9))) (let ((.cse2 (div .cse0 v_main_~z~0_BEFORE_CALL_14))) (let ((.cse1 (* v_main_~z~0_BEFORE_CALL_14 .cse2)) (.cse3 (* v_main_~a~0_BEFORE_CALL_15 v_main_~z~0_BEFORE_CALL_14))) (and (not (= v_main_~z~0_BEFORE_CALL_14 0)) (= (mod .cse0 v_main_~z~0_BEFORE_CALL_14) 0) (= (mod (+ v_main_~a~0_BEFORE_CALL_15 .cse1 (* .cse2 (- 1))) .cse3) 0) (not (= (+ (* v_main_~a~0_BEFORE_CALL_15 (div (+ v_main_~a~0_BEFORE_CALL_15 .cse1 (* (- 1) .cse2)) .cse3) v_main_~z~0_BEFORE_CALL_14 v_main_~z~0_BEFORE_CALL_14) v_main_~x~0_BEFORE_CALL_9) (+ v_main_~a~0_BEFORE_CALL_15 (* v_main_~z~0_BEFORE_CALL_14 v_main_~x~0_BEFORE_CALL_9)))) (not (= .cse3 0))))))))) is different from false [2021-05-02 20:55:58,529 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:58,540 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:00,666 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:00,667 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:00,675 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:00,677 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:00,678 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:00,679 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:00,680 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:02,696 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:02,697 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:02,698 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:02,699 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:02,700 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:02,701 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:02,702 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:02,711 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:04,796 WARN L838 $PredicateComparison]: unable to prove that (exists ((v_main_~a~0_BEFORE_CALL_15 Int) (v_main_~z~0_BEFORE_CALL_14 Int) (v_main_~x~0_BEFORE_CALL_9 Int)) (let ((.cse0 (+ (* v_main_~a~0_BEFORE_CALL_15 (- 1)) v_main_~x~0_BEFORE_CALL_9))) (let ((.cse2 (div .cse0 v_main_~z~0_BEFORE_CALL_14))) (let ((.cse1 (* v_main_~z~0_BEFORE_CALL_14 .cse2)) (.cse3 (* v_main_~a~0_BEFORE_CALL_15 v_main_~z~0_BEFORE_CALL_14))) (and (not (= v_main_~z~0_BEFORE_CALL_14 0)) (= (mod .cse0 v_main_~z~0_BEFORE_CALL_14) 0) (= (mod (+ v_main_~a~0_BEFORE_CALL_15 .cse1 (* .cse2 (- 1))) .cse3) 0) (not (= (+ (* v_main_~a~0_BEFORE_CALL_15 (div (+ v_main_~a~0_BEFORE_CALL_15 .cse1 (* (- 1) .cse2)) .cse3) v_main_~z~0_BEFORE_CALL_14 v_main_~z~0_BEFORE_CALL_14) v_main_~x~0_BEFORE_CALL_9) (+ v_main_~a~0_BEFORE_CALL_15 (* v_main_~z~0_BEFORE_CALL_14 v_main_~x~0_BEFORE_CALL_9)))) (not (= .cse3 0))))))) is different from false [2021-05-02 20:56:06,809 WARN L860 $PredicateComparison]: unable to prove that (exists ((v_main_~a~0_BEFORE_CALL_15 Int) (v_main_~z~0_BEFORE_CALL_14 Int) (v_main_~x~0_BEFORE_CALL_9 Int)) (let ((.cse0 (+ (* v_main_~a~0_BEFORE_CALL_15 (- 1)) v_main_~x~0_BEFORE_CALL_9))) (let ((.cse2 (div .cse0 v_main_~z~0_BEFORE_CALL_14))) (let ((.cse1 (* v_main_~z~0_BEFORE_CALL_14 .cse2)) (.cse3 (* v_main_~a~0_BEFORE_CALL_15 v_main_~z~0_BEFORE_CALL_14))) (and (not (= v_main_~z~0_BEFORE_CALL_14 0)) (= (mod .cse0 v_main_~z~0_BEFORE_CALL_14) 0) (= (mod (+ v_main_~a~0_BEFORE_CALL_15 .cse1 (* .cse2 (- 1))) .cse3) 0) (not (= (+ (* v_main_~a~0_BEFORE_CALL_15 (div (+ v_main_~a~0_BEFORE_CALL_15 .cse1 (* (- 1) .cse2)) .cse3) v_main_~z~0_BEFORE_CALL_14 v_main_~z~0_BEFORE_CALL_14) v_main_~x~0_BEFORE_CALL_9) (+ v_main_~a~0_BEFORE_CALL_15 (* v_main_~z~0_BEFORE_CALL_14 v_main_~x~0_BEFORE_CALL_9)))) (not (= .cse3 0))))))) is different from true [2021-05-02 20:56:06,809 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 1 not checked. [2021-05-02 20:56:06,810 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:56:06,810 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1948586727] [2021-05-02 20:56:06,810 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:56:06,810 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [512305528] [2021-05-02 20:56:06,810 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [512305528] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:56:06,810 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:56:06,810 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-02 20:56:06,810 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1789064924] [2021-05-02 20:56:06,810 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 20:56:06,810 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:56:06,811 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 20:56:06,811 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=40, Unknown=5, NotChecked=26, Total=90 [2021-05-02 20:56:06,811 INFO L87 Difference]: Start difference. First operand 39 states and 39 transitions. Second operand has 10 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 20:56:13,112 WARN L205 SmtUtils]: Spent 4.11 s on a formula simplification. DAG size of input: 45 DAG size of output: 6 [2021-05-02 20:57:40,459 WARN L205 SmtUtils]: Spent 1.14 m on a formula simplification. DAG size of input: 44 DAG size of output: 40 [2021-05-02 20:58:09,966 WARN L205 SmtUtils]: Spent 27.13 s on a formula simplification. DAG size of input: 43 DAG size of output: 36 [2021-05-02 20:58:13,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:58:13,995 INFO L93 Difference]: Finished difference Result 38 states and 38 transitions. [2021-05-02 20:58:14,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-02 20:58:14,006 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 36 [2021-05-02 20:58:14,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:58:14,006 INFO L225 Difference]: With dead ends: 38 [2021-05-02 20:58:14,007 INFO L226 Difference]: Without dead ends: 0 [2021-05-02 20:58:14,007 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 135839.0ms TimeCoverageRelationStatistics Valid=39, Invalid=90, Unknown=11, NotChecked=42, Total=182 [2021-05-02 20:58:14,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-05-02 20:58:14,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-05-02 20:58:14,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-02 20:58:14,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-05-02 20:58:14,007 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 36 [2021-05-02 20:58:14,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:58:14,007 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-05-02 20:58:14,007 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 20:58:14,007 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-05-02 20:58:14,008 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-05-02 20:58:14,208 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-05-02 20:58:14,211 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 08:58:14 BasicIcfg [2021-05-02 20:58:14,211 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-02 20:58:14,212 INFO L168 Benchmark]: Toolchain (without parser) took 376283.62 ms. Allocated memory is still 172.0 MB. Free memory was 136.5 MB in the beginning and 86.1 MB in the end (delta: 50.3 MB). Peak memory consumption was 51.0 MB. Max. memory is 8.0 GB. [2021-05-02 20:58:14,212 INFO L168 Benchmark]: CDTParser took 0.09 ms. Allocated memory is still 172.0 MB. Free memory is still 153.1 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-02 20:58:14,212 INFO L168 Benchmark]: CACSL2BoogieTranslator took 181.74 ms. Allocated memory is still 172.0 MB. Free memory was 136.2 MB in the beginning and 154.9 MB in the end (delta: -18.7 MB). Peak memory consumption was 12.3 MB. Max. memory is 8.0 GB. [2021-05-02 20:58:14,212 INFO L168 Benchmark]: Boogie Preprocessor took 41.59 ms. Allocated memory is still 172.0 MB. Free memory was 154.9 MB in the beginning and 153.3 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-05-02 20:58:14,212 INFO L168 Benchmark]: RCFGBuilder took 272.31 ms. Allocated memory is still 172.0 MB. Free memory was 153.3 MB in the beginning and 138.1 MB in the end (delta: 15.2 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. [2021-05-02 20:58:14,212 INFO L168 Benchmark]: IcfgTransformer took 12.95 ms. Allocated memory is still 172.0 MB. Free memory was 138.1 MB in the beginning and 136.5 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-05-02 20:58:14,212 INFO L168 Benchmark]: TraceAbstraction took 375769.09 ms. Allocated memory is still 172.0 MB. Free memory was 136.0 MB in the beginning and 86.1 MB in the end (delta: 49.9 MB). Peak memory consumption was 51.3 MB. Max. memory is 8.0 GB. [2021-05-02 20:58:14,213 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.09 ms. Allocated memory is still 172.0 MB. Free memory is still 153.1 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 181.74 ms. Allocated memory is still 172.0 MB. Free memory was 136.2 MB in the beginning and 154.9 MB in the end (delta: -18.7 MB). Peak memory consumption was 12.3 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 41.59 ms. Allocated memory is still 172.0 MB. Free memory was 154.9 MB in the beginning and 153.3 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 272.31 ms. Allocated memory is still 172.0 MB. Free memory was 153.3 MB in the beginning and 138.1 MB in the end (delta: 15.2 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. * IcfgTransformer took 12.95 ms. Allocated memory is still 172.0 MB. Free memory was 138.1 MB in the beginning and 136.5 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * TraceAbstraction took 375769.09 ms. Allocated memory is still 172.0 MB. Free memory was 136.0 MB in the beginning and 86.1 MB in the end (delta: 49.9 MB). Peak memory consumption was 51.3 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 17]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 22 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 375736.1ms, OverallIterations: 10, TraceHistogramMax: 4, EmptinessCheckTime: 11.3ms, AutomataDifference: 287350.8ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 5.3ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 174 SDtfs, 77 SDslu, 535 SDs, 0 SdLazy, 261 SolverSat, 27 SolverUnsat, 27 SolverUnknown, 0 SolverNotchecked, 56187.8ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 248 GetRequests, 178 SyntacticMatches, 4 SemanticMatches, 66 ConstructedPredicates, 4 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 279635.7ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=40occurred in iteration=7, InterpolantAutomatonStates: 71, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 44.3ms AutomataMinimizationTime, 10 MinimizatonAttempts, 2 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 103.0ms SsaConstructionTime, 383.8ms SatisfiabilityAnalysisTime, 85269.1ms InterpolantComputationTime, 237 NumberOfCodeBlocks, 205 NumberOfCodeBlocksAsserted, 14 NumberOfCheckSat, 227 ConstructedInterpolants, 6 QuantifiedInterpolants, 1739 SizeOfPredicates, 20 NumberOfNonLiveVariables, 1366 ConjunctsInSsa, 146 ConjunctsInUnsatCore, 10 InterpolantComputations, 3 PerfectInterpolantSequences, 115/148 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [MP z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forcibly destroying the process Received shutdown request...