/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/egcd2-ll_unwindbound2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 20:20:56,422 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 20:20:56,424 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 20:20:56,462 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-05-02 20:20:56,462 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-05-02 20:20:56,465 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-05-02 20:20:56,467 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-05-02 20:20:56,472 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-05-02 20:20:56,474 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-05-02 20:20:56,478 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-05-02 20:20:56,479 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-05-02 20:20:56,480 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-05-02 20:20:56,480 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-02 20:20:56,482 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-02 20:20:56,483 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-02 20:20:56,484 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-02 20:20:56,486 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-02 20:20:56,487 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-02 20:20:56,489 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-02 20:20:56,494 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-02 20:20:56,495 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-02 20:20:56,496 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-02 20:20:56,497 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-02 20:20:56,499 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-02 20:20:56,505 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-02 20:20:56,515 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 20:20:56,516 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 20:20:56,517 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 20:20:56,517 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2021-05-02 20:20:56,533 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 20:20:56,533 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 20:20:56,535 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 20:20:56,536 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 20:20:56,536 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 20:20:56,536 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 20:20:56,536 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 20:20:56,536 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 20:20:56,536 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 20:20:56,536 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 20:20:56,537 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 20:20:56,537 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 20:20:56,538 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 20:20:56,538 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 20:20:56,538 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 20:20:56,538 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 20:20:56,538 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-02 20:20:56,538 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 20:20:56,538 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 20:20:56,539 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 20:20:56,539 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-02 20:20:56,540 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-05-02 20:20:56,540 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 20:20:56,836 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 20:20:56,871 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 20:20:56,873 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 20:20:56,874 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 20:20:56,875 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 20:20:56,876 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/egcd2-ll_unwindbound2.c [2021-05-02 20:20:56,932 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b2ef78352/cfef0f99be3f4fb39b8b0e3e762ddb19/FLAG98773d69c [2021-05-02 20:20:57,322 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 20:20:57,322 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/egcd2-ll_unwindbound2.c [2021-05-02 20:20:57,329 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b2ef78352/cfef0f99be3f4fb39b8b0e3e762ddb19/FLAG98773d69c [2021-05-02 20:20:57,348 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b2ef78352/cfef0f99be3f4fb39b8b0e3e762ddb19 [2021-05-02 20:20:57,351 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 20:20:57,353 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-05-02 20:20:57,357 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 20:20:57,357 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 20:20:57,360 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 20:20:57,360 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 08:20:57" (1/1) ... [2021-05-02 20:20:57,361 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@399f31e9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:20:57, skipping insertion in model container [2021-05-02 20:20:57,361 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 08:20:57" (1/1) ... [2021-05-02 20:20:57,367 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 20:20:57,383 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 20:20:57,533 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/egcd2-ll_unwindbound2.c[490,503] [2021-05-02 20:20:57,567 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 20:20:57,573 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 20:20:57,627 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/egcd2-ll_unwindbound2.c[490,503] [2021-05-02 20:20:57,650 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 20:20:57,663 INFO L208 MainTranslator]: Completed translation [2021-05-02 20:20:57,664 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:20:57 WrapperNode [2021-05-02 20:20:57,664 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 20:20:57,665 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 20:20:57,665 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 20:20:57,665 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 20:20:57,675 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:20:57" (1/1) ... [2021-05-02 20:20:57,675 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:20:57" (1/1) ... [2021-05-02 20:20:57,688 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:20:57" (1/1) ... [2021-05-02 20:20:57,688 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:20:57" (1/1) ... [2021-05-02 20:20:57,699 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:20:57" (1/1) ... [2021-05-02 20:20:57,703 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:20:57" (1/1) ... [2021-05-02 20:20:57,704 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:20:57" (1/1) ... [2021-05-02 20:20:57,706 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 20:20:57,706 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 20:20:57,706 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 20:20:57,707 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 20:20:57,707 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:20:57" (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 20:20:57,799 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 20:20:57,800 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 20:20:57,800 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 20:20:57,800 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-02 20:20:57,800 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 20:20:57,800 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 20:20:57,800 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 20:20:57,800 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 20:20:57,800 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 20:20:57,801 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 20:20:57,801 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-02 20:20:57,801 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-02 20:20:57,801 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 20:20:57,801 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 20:20:57,801 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 20:20:57,801 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 20:20:57,801 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 20:20:57,802 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 20:20:57,802 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 20:20:57,802 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 20:20:58,094 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 20:20:58,094 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-05-02 20:20:58,095 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 08:20:58 BoogieIcfgContainer [2021-05-02 20:20:58,095 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 20:20:58,096 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2021-05-02 20:20:58,096 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2021-05-02 20:20:58,113 INFO L275 PluginConnector]: IcfgTransformer initialized [2021-05-02 20:20:58,116 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 08:20:58" (1/1) ... [2021-05-02 20:20:58,147 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 02.05 08:20:58 BasicIcfg [2021-05-02 20:20:58,148 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2021-05-02 20:20:58,149 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 20:20:58,149 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 20:20:58,151 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 20:20:58,151 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 08:20:57" (1/4) ... [2021-05-02 20:20:58,152 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ddbe629 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 08:20:58, skipping insertion in model container [2021-05-02 20:20:58,152 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:20:57" (2/4) ... [2021-05-02 20:20:58,152 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ddbe629 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 08:20:58, skipping insertion in model container [2021-05-02 20:20:58,153 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 08:20:58" (3/4) ... [2021-05-02 20:20:58,153 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ddbe629 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 08:20:58, skipping insertion in model container [2021-05-02 20:20:58,153 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 02.05 08:20:58" (4/4) ... [2021-05-02 20:20:58,154 INFO L111 eAbstractionObserver]: Analyzing ICFG egcd2-ll_unwindbound2.cJordan [2021-05-02 20:20:58,158 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2021-05-02 20:20:58,178 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 20:20:58,192 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 20:20:58,240 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 20:20:58,240 INFO L377 AbstractCegarLoop]: Hoare is false [2021-05-02 20:20:58,240 INFO L378 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2021-05-02 20:20:58,240 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 20:20:58,240 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 20:20:58,241 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 20:20:58,241 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 20:20:58,241 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 20:20:58,263 INFO L276 IsEmpty]: Start isEmpty. Operand has 39 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 23 states have internal predecessors, (30), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2021-05-02 20:20:58,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-02 20:20:58,269 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:20:58,269 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:20:58,270 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:20:58,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:20:58,274 INFO L82 PathProgramCache]: Analyzing trace with hash -282167495, now seen corresponding path program 1 times [2021-05-02 20:20:58,283 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:20:58,283 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [584729316] [2021-05-02 20:20:58,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:20:58,404 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:20:58,405 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1281201870] [2021-05-02 20:20:58,405 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 20:20:58,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:20:58,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 1 conjunts are in the unsatisfiable core [2021-05-02 20:20:58,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:20:58,608 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-05-02 20:20:58,608 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:20:58,608 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [584729316] [2021-05-02 20:20:58,608 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:20:58,608 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1281201870] [2021-05-02 20:20:58,609 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1281201870] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 20:20:58,609 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 20:20:58,609 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-05-02 20:20:58,610 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [387850692] [2021-05-02 20:20:58,630 INFO L460 AbstractCegarLoop]: Interpolant automaton has 2 states [2021-05-02 20:20:58,631 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:20:58,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-05-02 20:20:58,642 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-05-02 20:20:58,643 INFO L87 Difference]: Start difference. First operand has 39 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 23 states have internal predecessors, (30), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) Second operand has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2021-05-02 20:20:58,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:20:58,657 INFO L93 Difference]: Finished difference Result 39 states and 50 transitions. [2021-05-02 20:20:58,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-05-02 20:20:58,659 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 32 [2021-05-02 20:20:58,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:20:58,666 INFO L225 Difference]: With dead ends: 39 [2021-05-02 20:20:58,666 INFO L226 Difference]: Without dead ends: 34 [2021-05-02 20:20:58,667 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 31 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 20:20:58,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-05-02 20:20:58,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2021-05-02 20:20:58,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 18 states have (on average 1.2777777777777777) internal successors, (23), 20 states have internal predecessors, (23), 12 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-05-02 20:20:58,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 45 transitions. [2021-05-02 20:20:58,712 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 45 transitions. Word has length 32 [2021-05-02 20:20:58,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:20:58,715 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 45 transitions. [2021-05-02 20:20:58,715 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2021-05-02 20:20:58,715 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 45 transitions. [2021-05-02 20:20:58,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-02 20:20:58,716 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:20:58,717 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:20:58,926 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2021-05-02 20:20:58,926 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:20:58,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:20:58,927 INFO L82 PathProgramCache]: Analyzing trace with hash -127828113, now seen corresponding path program 1 times [2021-05-02 20:20:58,927 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:20:58,927 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [241321634] [2021-05-02 20:20:58,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:20:58,964 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:20:58,964 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1993495203] [2021-05-02 20:20:58,964 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 20:20:59,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:20:59,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-02 20:20:59,044 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:20:59,089 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:59,094 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:59,095 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:59,173 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:59,176 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:59,196 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-05-02 20:20:59,196 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:20:59,196 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [241321634] [2021-05-02 20:20:59,196 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:20:59,196 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1993495203] [2021-05-02 20:20:59,197 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1993495203] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 20:20:59,197 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 20:20:59,197 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-02 20:20:59,197 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1545079169] [2021-05-02 20:20:59,198 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-02 20:20:59,198 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:20:59,199 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-02 20:20:59,199 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-02 20:20:59,199 INFO L87 Difference]: Start difference. First operand 34 states and 45 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-02 20:20:59,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:20:59,219 INFO L93 Difference]: Finished difference Result 36 states and 47 transitions. [2021-05-02 20:20:59,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-02 20:20:59,220 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) Word has length 33 [2021-05-02 20:20:59,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:20:59,221 INFO L225 Difference]: With dead ends: 36 [2021-05-02 20:20:59,221 INFO L226 Difference]: Without dead ends: 36 [2021-05-02 20:20:59,221 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 14.4ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-02 20:20:59,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-05-02 20:20:59,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2021-05-02 20:20:59,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 20 states have (on average 1.25) internal successors, (25), 21 states have internal predecessors, (25), 12 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-05-02 20:20:59,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 47 transitions. [2021-05-02 20:20:59,227 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 47 transitions. Word has length 33 [2021-05-02 20:20:59,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:20:59,227 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 47 transitions. [2021-05-02 20:20:59,228 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-02 20:20:59,228 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 47 transitions. [2021-05-02 20:20:59,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-05-02 20:20:59,229 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:20:59,229 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:20:59,442 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:20:59,442 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:20:59,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:20:59,443 INFO L82 PathProgramCache]: Analyzing trace with hash 365419517, now seen corresponding path program 1 times [2021-05-02 20:20:59,443 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:20:59,443 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [498065117] [2021-05-02 20:20:59,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:20:59,458 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:20:59,459 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [169320699] [2021-05-02 20:20:59,459 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 20:20:59,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:20:59,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-02 20:20:59,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:20:59,587 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:59,595 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:59,596 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:59,604 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:59,605 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:59,619 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-05-02 20:20:59,620 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:20:59,620 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [498065117] [2021-05-02 20:20:59,620 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:20:59,620 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [169320699] [2021-05-02 20:20:59,620 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [169320699] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:20:59,620 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:20:59,620 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-02 20:20:59,621 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [612613513] [2021-05-02 20:20:59,621 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 20:20:59,621 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:20:59,622 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 20:20:59,622 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-02 20:20:59,622 INFO L87 Difference]: Start difference. First operand 36 states and 47 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-02 20:20:59,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:20:59,743 INFO L93 Difference]: Finished difference Result 45 states and 62 transitions. [2021-05-02 20:20:59,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-02 20:20:59,744 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 34 [2021-05-02 20:20:59,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:20:59,748 INFO L225 Difference]: With dead ends: 45 [2021-05-02 20:20:59,748 INFO L226 Difference]: Without dead ends: 45 [2021-05-02 20:20:59,749 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 28.7ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-05-02 20:20:59,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-05-02 20:20:59,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 37. [2021-05-02 20:20:59,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 21 states have (on average 1.2380952380952381) internal successors, (26), 22 states have internal predecessors, (26), 12 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-05-02 20:20:59,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 48 transitions. [2021-05-02 20:20:59,770 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 48 transitions. Word has length 34 [2021-05-02 20:20:59,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:20:59,770 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 48 transitions. [2021-05-02 20:20:59,770 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-02 20:20:59,770 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 48 transitions. [2021-05-02 20:20:59,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-02 20:20:59,771 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:20:59,771 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:20:59,972 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:20:59,972 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:20:59,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:20:59,977 INFO L82 PathProgramCache]: Analyzing trace with hash 196514290, now seen corresponding path program 1 times [2021-05-02 20:20:59,977 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:20:59,977 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [41626251] [2021-05-02 20:20:59,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:21:00,000 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:21:00,001 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [493808109] [2021-05-02 20:21:00,001 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 20:21:00,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:21:00,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-02 20:21:00,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:21:00,094 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:00,125 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:00,139 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:00,143 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:00,156 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:00,158 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:00,192 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:00,194 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:00,215 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-02 20:21:00,215 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:21:00,215 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [41626251] [2021-05-02 20:21:00,215 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:21:00,215 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [493808109] [2021-05-02 20:21:00,216 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [493808109] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:21:00,216 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:21:00,216 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-02 20:21:00,216 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1887082672] [2021-05-02 20:21:00,216 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 20:21:00,217 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:21:00,217 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 20:21:00,217 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-05-02 20:21:00,218 INFO L87 Difference]: Start difference. First operand 37 states and 48 transitions. Second operand has 9 states, 9 states have (on average 2.0) internal successors, (18), 7 states have internal predecessors, (18), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-02 20:21:00,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:21:00,380 INFO L93 Difference]: Finished difference Result 57 states and 79 transitions. [2021-05-02 20:21:00,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 20:21:00,380 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 7 states have internal predecessors, (18), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 36 [2021-05-02 20:21:00,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:21:00,383 INFO L225 Difference]: With dead ends: 57 [2021-05-02 20:21:00,383 INFO L226 Difference]: Without dead ends: 57 [2021-05-02 20:21:00,385 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 78.6ms TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-05-02 20:21:00,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2021-05-02 20:21:00,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 44. [2021-05-02 20:21:00,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 26 states have (on average 1.2307692307692308) internal successors, (32), 28 states have internal predecessors, (32), 13 states have call successors, (13), 5 states have call predecessors, (13), 4 states have return successors, (11), 10 states have call predecessors, (11), 11 states have call successors, (11) [2021-05-02 20:21:00,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 56 transitions. [2021-05-02 20:21:00,397 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 56 transitions. Word has length 36 [2021-05-02 20:21:00,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:21:00,398 INFO L480 AbstractCegarLoop]: Abstraction has 44 states and 56 transitions. [2021-05-02 20:21:00,398 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 7 states have internal predecessors, (18), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-02 20:21:00,399 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 56 transitions. [2021-05-02 20:21:00,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-02 20:21:00,401 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:21:00,403 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:21:00,603 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:21:00,603 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:21:00,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:21:00,605 INFO L82 PathProgramCache]: Analyzing trace with hash 56558454, now seen corresponding path program 1 times [2021-05-02 20:21:00,605 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:21:00,606 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [959781110] [2021-05-02 20:21:00,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:21:00,631 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:21:00,631 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [905320298] [2021-05-02 20:21:00,631 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 20:21:00,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:21:00,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-02 20:21:00,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:21:00,696 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:00,701 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:00,705 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:00,747 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:00,753 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:00,757 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:00,775 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:00,777 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:00,793 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-05-02 20:21:00,794 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:21:00,794 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [959781110] [2021-05-02 20:21:00,794 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:21:00,794 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [905320298] [2021-05-02 20:21:00,794 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [905320298] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 20:21:00,794 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 20:21:00,794 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-02 20:21:00,794 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [51246156] [2021-05-02 20:21:00,795 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-02 20:21:00,795 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:21:00,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-02 20:21:00,795 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-02 20:21:00,795 INFO L87 Difference]: Start difference. First operand 44 states and 56 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 3 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-02 20:21:00,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:21:00,821 INFO L93 Difference]: Finished difference Result 44 states and 55 transitions. [2021-05-02 20:21:00,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-02 20:21:00,822 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 3 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) Word has length 39 [2021-05-02 20:21:00,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:21:00,831 INFO L225 Difference]: With dead ends: 44 [2021-05-02 20:21:00,831 INFO L226 Difference]: Without dead ends: 44 [2021-05-02 20:21:00,831 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 8.2ms TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-02 20:21:00,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-05-02 20:21:00,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2021-05-02 20:21:00,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 26 states have (on average 1.1923076923076923) internal successors, (31), 28 states have internal predecessors, (31), 13 states have call successors, (13), 5 states have call predecessors, (13), 4 states have return successors, (11), 10 states have call predecessors, (11), 11 states have call successors, (11) [2021-05-02 20:21:00,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 55 transitions. [2021-05-02 20:21:00,835 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 55 transitions. Word has length 39 [2021-05-02 20:21:00,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:21:00,835 INFO L480 AbstractCegarLoop]: Abstraction has 44 states and 55 transitions. [2021-05-02 20:21:00,836 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 3 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-02 20:21:00,836 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 55 transitions. [2021-05-02 20:21:00,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-05-02 20:21:00,836 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:21:00,837 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:21:01,053 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:21:01,053 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:21:01,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:21:01,053 INFO L82 PathProgramCache]: Analyzing trace with hash 578094295, now seen corresponding path program 1 times [2021-05-02 20:21:01,054 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:21:01,054 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [124171352] [2021-05-02 20:21:01,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:21:01,069 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:21:01,069 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1377896575] [2021-05-02 20:21:01,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:21:01,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:21:01,137 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-02 20:21:01,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:21:01,172 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:01,174 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:01,193 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:01,194 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:01,207 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:01,211 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:01,249 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:01,251 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:01,264 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:01,266 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:01,288 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-05-02 20:21:01,289 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:21:01,289 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [124171352] [2021-05-02 20:21:01,289 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:21:01,289 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1377896575] [2021-05-02 20:21:01,289 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1377896575] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:21:01,289 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:21:01,289 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-02 20:21:01,289 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [396825036] [2021-05-02 20:21:01,290 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 20:21:01,290 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:21:01,290 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 20:21:01,290 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-02 20:21:01,291 INFO L87 Difference]: Start difference. First operand 44 states and 55 transitions. Second operand has 8 states, 8 states have (on average 2.625) internal successors, (21), 6 states have internal predecessors, (21), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2021-05-02 20:21:01,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:21:01,393 INFO L93 Difference]: Finished difference Result 56 states and 72 transitions. [2021-05-02 20:21:01,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 20:21:01,394 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 6 states have internal predecessors, (21), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 41 [2021-05-02 20:21:01,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:21:01,395 INFO L225 Difference]: With dead ends: 56 [2021-05-02 20:21:01,395 INFO L226 Difference]: Without dead ends: 56 [2021-05-02 20:21:01,395 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 41.2ms TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-05-02 20:21:01,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-05-02 20:21:01,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 55. [2021-05-02 20:21:01,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 32 states have (on average 1.21875) internal successors, (39), 34 states have internal predecessors, (39), 17 states have call successors, (17), 6 states have call predecessors, (17), 5 states have return successors, (15), 14 states have call predecessors, (15), 15 states have call successors, (15) [2021-05-02 20:21:01,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 71 transitions. [2021-05-02 20:21:01,400 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 71 transitions. Word has length 41 [2021-05-02 20:21:01,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:21:01,400 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 71 transitions. [2021-05-02 20:21:01,401 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 6 states have internal predecessors, (21), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2021-05-02 20:21:01,401 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 71 transitions. [2021-05-02 20:21:01,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-05-02 20:21:01,401 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:21:01,402 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:21:01,617 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:21:01,617 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:21:01,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:21:01,618 INFO L82 PathProgramCache]: Analyzing trace with hash -1581112078, now seen corresponding path program 1 times [2021-05-02 20:21:01,618 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:21:01,618 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [534650064] [2021-05-02 20:21:01,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:21:01,626 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:21:01,626 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1733670123] [2021-05-02 20:21:01,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:21:01,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:21:01,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-02 20:21:01,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:21:01,733 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:01,734 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:01,756 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:01,758 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:01,769 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:01,773 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:01,797 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:01,799 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:01,807 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:01,810 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:01,824 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:01,826 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:01,843 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-05-02 20:21:01,844 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:21:01,844 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [534650064] [2021-05-02 20:21:01,844 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:21:01,844 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1733670123] [2021-05-02 20:21:01,844 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1733670123] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:21:01,844 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:21:01,844 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-02 20:21:01,844 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1153457379] [2021-05-02 20:21:01,845 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 20:21:01,845 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:21:01,845 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 20:21:01,845 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-02 20:21:01,846 INFO L87 Difference]: Start difference. First operand 55 states and 71 transitions. Second operand has 8 states, 8 states have (on average 2.625) internal successors, (21), 6 states have internal predecessors, (21), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-02 20:21:01,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:21:01,949 INFO L93 Difference]: Finished difference Result 60 states and 75 transitions. [2021-05-02 20:21:01,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 20:21:01,950 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 6 states have internal predecessors, (21), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 46 [2021-05-02 20:21:01,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:21:01,953 INFO L225 Difference]: With dead ends: 60 [2021-05-02 20:21:01,953 INFO L226 Difference]: Without dead ends: 60 [2021-05-02 20:21:01,953 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 40.7ms TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-05-02 20:21:01,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-05-02 20:21:01,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 59. [2021-05-02 20:21:01,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 35 states have (on average 1.2) internal successors, (42), 37 states have internal predecessors, (42), 17 states have call successors, (17), 7 states have call predecessors, (17), 6 states have return successors, (15), 14 states have call predecessors, (15), 15 states have call successors, (15) [2021-05-02 20:21:01,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 74 transitions. [2021-05-02 20:21:01,969 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 74 transitions. Word has length 46 [2021-05-02 20:21:01,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:21:01,970 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 74 transitions. [2021-05-02 20:21:01,971 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 6 states have internal predecessors, (21), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-02 20:21:01,971 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 74 transitions. [2021-05-02 20:21:01,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-05-02 20:21:01,971 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:21:01,972 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:21:02,194 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:21:02,194 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:21:02,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:21:02,194 INFO L82 PathProgramCache]: Analyzing trace with hash 1942645143, now seen corresponding path program 1 times [2021-05-02 20:21:02,195 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:21:02,195 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [734238420] [2021-05-02 20:21:02,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:21:02,212 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:21:02,212 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1200673012] [2021-05-02 20:21:02,212 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 20:21:02,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:21:02,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 26 conjunts are in the unsatisfiable core [2021-05-02 20:21:02,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:21:02,307 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:02,308 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:02,333 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:02,335 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:02,347 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:02,348 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:02,378 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:02,381 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:02,392 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:02,396 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:02,405 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:02,407 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:02,437 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:02,438 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:02,458 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 11 proven. 10 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-05-02 20:21:02,458 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:21:02,458 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [734238420] [2021-05-02 20:21:02,458 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:21:02,458 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1200673012] [2021-05-02 20:21:02,458 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1200673012] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:21:02,459 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:21:02,459 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-02 20:21:02,459 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [13766253] [2021-05-02 20:21:02,459 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 20:21:02,459 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:21:02,460 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 20:21:02,460 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-05-02 20:21:02,460 INFO L87 Difference]: Start difference. First operand 59 states and 74 transitions. Second operand has 10 states, 10 states have (on average 2.4) internal successors, (24), 8 states have internal predecessors, (24), 3 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-05-02 20:21:04,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:21:04,683 INFO L93 Difference]: Finished difference Result 64 states and 78 transitions. [2021-05-02 20:21:04,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-02 20:21:04,684 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 8 states have internal predecessors, (24), 3 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 51 [2021-05-02 20:21:04,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:21:04,685 INFO L225 Difference]: With dead ends: 64 [2021-05-02 20:21:04,685 INFO L226 Difference]: Without dead ends: 64 [2021-05-02 20:21:04,685 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 97.2ms TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-05-02 20:21:04,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-05-02 20:21:04,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 63. [2021-05-02 20:21:04,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 38 states have (on average 1.1842105263157894) internal successors, (45), 40 states have internal predecessors, (45), 17 states have call successors, (17), 8 states have call predecessors, (17), 7 states have return successors, (15), 14 states have call predecessors, (15), 15 states have call successors, (15) [2021-05-02 20:21:04,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 77 transitions. [2021-05-02 20:21:04,689 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 77 transitions. Word has length 51 [2021-05-02 20:21:04,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:21:04,690 INFO L480 AbstractCegarLoop]: Abstraction has 63 states and 77 transitions. [2021-05-02 20:21:04,690 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 8 states have internal predecessors, (24), 3 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-05-02 20:21:04,690 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 77 transitions. [2021-05-02 20:21:04,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-05-02 20:21:04,691 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:21:04,691 INFO L523 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:21:04,907 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-05-02 20:21:04,908 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:21:04,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:21:04,908 INFO L82 PathProgramCache]: Analyzing trace with hash -1782154901, now seen corresponding path program 1 times [2021-05-02 20:21:04,908 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:21:04,909 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2058075631] [2021-05-02 20:21:04,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:21:04,918 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:21:04,918 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [908292978] [2021-05-02 20:21:04,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:21:04,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:21:04,986 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-02 20:21:04,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:21:05,000 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:05,005 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:05,006 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:05,044 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:05,046 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:05,047 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:05,056 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:05,058 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:05,059 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:05,098 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:05,099 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:05,111 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2021-05-02 20:21:05,111 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:21:05,112 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2058075631] [2021-05-02 20:21:05,112 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:21:05,112 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [908292978] [2021-05-02 20:21:05,112 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [908292978] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:21:05,112 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:21:05,112 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-02 20:21:05,112 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398595087] [2021-05-02 20:21:05,112 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 20:21:05,113 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:21:05,113 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 20:21:05,113 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-02 20:21:05,113 INFO L87 Difference]: Start difference. First operand 63 states and 77 transitions. Second operand has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 4 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) [2021-05-02 20:21:05,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:21:05,175 INFO L93 Difference]: Finished difference Result 57 states and 63 transitions. [2021-05-02 20:21:05,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-02 20:21:05,176 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 4 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) Word has length 59 [2021-05-02 20:21:05,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:21:05,177 INFO L225 Difference]: With dead ends: 57 [2021-05-02 20:21:05,177 INFO L226 Difference]: Without dead ends: 57 [2021-05-02 20:21:05,178 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 19.3ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-05-02 20:21:05,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2021-05-02 20:21:05,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 55. [2021-05-02 20:21:05,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 35 states have (on average 1.1142857142857143) internal successors, (39), 36 states have internal predecessors, (39), 12 states have call successors, (12), 8 states have call predecessors, (12), 7 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-05-02 20:21:05,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 61 transitions. [2021-05-02 20:21:05,190 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 61 transitions. Word has length 59 [2021-05-02 20:21:05,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:21:05,191 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 61 transitions. [2021-05-02 20:21:05,191 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 4 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) [2021-05-02 20:21:05,191 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 61 transitions. [2021-05-02 20:21:05,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-05-02 20:21:05,192 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:21:05,192 INFO L523 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:21:05,416 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:21:05,416 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:21:05,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:21:05,417 INFO L82 PathProgramCache]: Analyzing trace with hash -1573186588, now seen corresponding path program 1 times [2021-05-02 20:21:05,417 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:21:05,417 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [79122016] [2021-05-02 20:21:05,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:21:05,430 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:21:05,430 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1831009460] [2021-05-02 20:21:05,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:21:05,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-05-02 20:21:05,493 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-05-02 20:21:05,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-05-02 20:21:05,517 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-05-02 20:21:05,613 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-05-02 20:21:05,613 INFO L624 BasicCegarLoop]: Counterexample might be feasible [2021-05-02 20:21:05,837 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:21:05,877 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 08:21:05 BasicIcfg [2021-05-02 20:21:05,877 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-02 20:21:05,878 INFO L168 Benchmark]: Toolchain (without parser) took 8525.41 ms. Allocated memory was 186.6 MB in the beginning and 245.4 MB in the end (delta: 58.7 MB). Free memory was 152.1 MB in the beginning and 122.9 MB in the end (delta: 29.3 MB). Peak memory consumption was 89.3 MB. Max. memory is 8.0 GB. [2021-05-02 20:21:05,878 INFO L168 Benchmark]: CDTParser took 0.11 ms. Allocated memory is still 186.6 MB. Free memory is still 168.7 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-02 20:21:05,878 INFO L168 Benchmark]: CACSL2BoogieTranslator took 307.46 ms. Allocated memory is still 186.6 MB. Free memory was 151.9 MB in the beginning and 169.6 MB in the end (delta: -17.7 MB). Peak memory consumption was 11.6 MB. Max. memory is 8.0 GB. [2021-05-02 20:21:05,878 INFO L168 Benchmark]: Boogie Preprocessor took 40.98 ms. Allocated memory is still 186.6 MB. Free memory was 169.6 MB in the beginning and 168.0 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-05-02 20:21:05,878 INFO L168 Benchmark]: RCFGBuilder took 389.14 ms. Allocated memory is still 186.6 MB. Free memory was 168.0 MB in the beginning and 150.7 MB in the end (delta: 17.3 MB). Peak memory consumption was 16.8 MB. Max. memory is 8.0 GB. [2021-05-02 20:21:05,878 INFO L168 Benchmark]: IcfgTransformer took 51.60 ms. Allocated memory is still 186.6 MB. Free memory was 150.7 MB in the beginning and 149.2 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-05-02 20:21:05,879 INFO L168 Benchmark]: TraceAbstraction took 7728.36 ms. Allocated memory was 186.6 MB in the beginning and 245.4 MB in the end (delta: 58.7 MB). Free memory was 148.6 MB in the beginning and 122.9 MB in the end (delta: 25.8 MB). Peak memory consumption was 86.1 MB. Max. memory is 8.0 GB. [2021-05-02 20:21:05,879 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11 ms. Allocated memory is still 186.6 MB. Free memory is still 168.7 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 307.46 ms. Allocated memory is still 186.6 MB. Free memory was 151.9 MB in the beginning and 169.6 MB in the end (delta: -17.7 MB). Peak memory consumption was 11.6 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 40.98 ms. Allocated memory is still 186.6 MB. Free memory was 169.6 MB in the beginning and 168.0 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 389.14 ms. Allocated memory is still 186.6 MB. Free memory was 168.0 MB in the beginning and 150.7 MB in the end (delta: 17.3 MB). Peak memory consumption was 16.8 MB. Max. memory is 8.0 GB. * IcfgTransformer took 51.60 ms. Allocated memory is still 186.6 MB. Free memory was 150.7 MB in the beginning and 149.2 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * TraceAbstraction took 7728.36 ms. Allocated memory was 186.6 MB in the beginning and 245.4 MB in the end (delta: 58.7 MB). Free memory was 148.6 MB in the beginning and 122.9 MB in the end (delta: 25.8 MB). Peak memory consumption was 86.1 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 13]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L18] int counter = 0; VAL [\old(counter)=17, counter=0] [L20] int x, y; [L21] long long a, b, p, q, r, s, c, k, xy, yy; [L22] x = __VERIFIER_nondet_int() [L23] y = __VERIFIER_nondet_int() [L24] CALL assume_abort_if_not(x >= 1) VAL [\old(cond)=1, \old(counter)=0, counter=0] [L8] COND FALSE !(!cond) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=0] [L24] RET assume_abort_if_not(x >= 1) VAL [\old(counter)=0, counter=0, x=1, y=2] [L25] CALL assume_abort_if_not(y >= 1) VAL [\old(cond)=1, \old(counter)=0, counter=0] [L8] COND FALSE !(!cond) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=0] [L25] RET assume_abort_if_not(y >= 1) VAL [\old(counter)=0, counter=0, x=1, y=2] [L27] a = x [L28] b = y [L29] p = 1 [L30] q = 0 [L31] r = 0 [L32] s = 1 [L33] c = 0 [L34] k = 0 [L35] xy = (long long) x * y [L36] yy = (long long) y * y VAL [\old(counter)=0, a=1, b=2, c=0, counter=0, k=0, p=1, q=0, r=0, s=1, x=1, xy=2, y=2, yy=4] [L37] CALL assume_abort_if_not(xy < 2147483647) VAL [\old(cond)=1, \old(counter)=0, counter=0] [L8] COND FALSE !(!cond) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=0] [L37] RET assume_abort_if_not(xy < 2147483647) VAL [\old(counter)=0, a=1, b=2, c=0, counter=0, k=0, p=1, q=0, r=0, s=1, x=1, xy=2, y=2, yy=4] [L38] CALL assume_abort_if_not(yy < 2147483647) VAL [\old(cond)=1, \old(counter)=0, counter=0] [L8] COND FALSE !(!cond) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=0] [L38] RET assume_abort_if_not(yy < 2147483647) VAL [\old(counter)=0, a=1, b=2, c=0, counter=0, k=0, p=1, q=0, r=0, s=1, x=1, xy=2, y=2, yy=4] [L40] EXPR counter++ VAL [\old(counter)=0, a=1, b=2, c=0, counter=1, counter++=0, k=0, p=1, q=0, r=0, s=1, x=1, xy=2, y=2, yy=4] [L40] COND TRUE counter++<2 [L41] COND FALSE !(!(b != 0)) [L43] c = a [L44] k = 0 VAL [\old(counter)=0, a=1, b=2, c=1, counter=1, k=0, p=1, q=0, r=0, s=1, x=1, xy=2, y=2, yy=4] [L46] EXPR counter++ VAL [\old(counter)=0, a=1, b=2, c=1, counter=2, counter++=1, k=0, p=1, q=0, r=0, s=1, x=1, xy=2, y=2, yy=4] [L46] COND TRUE counter++<2 [L47] CALL __VERIFIER_assert(a == k * b + c) VAL [\old(cond)=1, \old(counter)=0, counter=2] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=2] [L47] RET __VERIFIER_assert(a == k * b + c) VAL [\old(counter)=0, a=1, b=2, c=1, counter=2, k=0, p=1, q=0, r=0, s=1, x=1, xy=2, y=2, yy=4] [L48] CALL __VERIFIER_assert(a == y*r + x*p) VAL [\old(cond)=1, \old(counter)=0, counter=2] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=2] [L48] RET __VERIFIER_assert(a == y*r + x*p) VAL [\old(counter)=0, a=1, b=2, c=1, counter=2, k=0, p=1, q=0, r=0, s=1, x=1, xy=2, y=2, yy=4] [L49] CALL __VERIFIER_assert(b == x * q + y * s) VAL [\old(cond)=1, \old(counter)=0, counter=2] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=2] [L49] RET __VERIFIER_assert(b == x * q + y * s) VAL [\old(counter)=0, a=1, b=2, c=1, counter=2, k=0, p=1, q=0, r=0, s=1, x=1, xy=2, y=2, yy=4] [L50] CALL __VERIFIER_assert(q*xy + s*yy - q*x - b*y - s*y + b == 0) VAL [\old(cond)=1, \old(counter)=0, counter=2] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=2] [L50] RET __VERIFIER_assert(q*xy + s*yy - q*x - b*y - s*y + b == 0) VAL [\old(counter)=0, a=1, b=2, c=1, counter=2, k=0, p=1, q=0, r=0, s=1, x=1, xy=2, y=2, yy=4] [L51] COND TRUE !(c >= b) VAL [\old(counter)=0, a=1, b=2, c=1, counter=2, k=0, p=1, q=0, r=0, s=1, x=1, xy=2, y=2, yy=4] [L57] a = b [L58] b = c [L60] long long temp; [L61] temp = p [L62] p = q [L63] q = temp - q * k [L64] temp = r [L65] r = s [L66] s = temp - s * k VAL [\old(counter)=0, a=2, b=1, c=1, counter=2, k=0, p=0, q=1, r=1, s=0, temp=0, x=1, xy=2, y=2, yy=4] [L40] EXPR counter++ VAL [\old(counter)=0, a=2, b=1, c=1, counter=3, counter++=2, k=0, p=0, q=1, r=1, s=0, temp=0, x=1, xy=2, y=2, yy=4] [L40] COND FALSE !(counter++<2) [L70] CALL __VERIFIER_assert(q*x + s*y == 0) VAL [\old(cond)=0, \old(counter)=0, counter=3] [L11] COND TRUE !(cond) VAL [\old(cond)=0, \old(counter)=0, cond=0, counter=3] [L13] reach_error() VAL [\old(cond)=0, \old(counter)=0, cond=0, counter=3] - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 39 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 7599.5ms, OverallIterations: 10, TraceHistogramMax: 5, EmptinessCheckTime: 30.3ms, AutomataDifference: 2894.2ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 7.3ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 367 SDtfs, 187 SDslu, 1021 SDs, 0 SdLazy, 570 SolverSat, 85 SolverUnsat, 1 SolverUnknown, 0 SolverNotchecked, 2467.3ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 376 GetRequests, 321 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 328.7ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=63occurred in iteration=8, InterpolantAutomatonStates: 58, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 112.3ms AutomataMinimizationTime, 9 MinimizatonAttempts, 26 StatesRemovedByMinimization, 6 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 119.8ms SsaConstructionTime, 302.2ms SatisfiabilityAnalysisTime, 1210.9ms InterpolantComputationTime, 431 NumberOfCodeBlocks, 431 NumberOfCodeBlocksAsserted, 10 NumberOfCheckSat, 362 ConstructedInterpolants, 0 QuantifiedInterpolants, 1132 SizeOfPredicates, 20 NumberOfNonLiveVariables, 1608 ConjunctsInSsa, 110 ConjunctsInUnsatCore, 9 InterpolantComputations, 3 PerfectInterpolantSequences, 234/281 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 RESULT: Ultimate proved your program to be incorrect! Received shutdown request...