/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerCTransformed.xml -s ../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf -i ../../../trunk/examples/svcomp/nla-digbench-scaling/cohendiv-ll_unwindbound1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-6253b08 [2021-05-06 07:22:25,459 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-06 07:22:25,462 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-06 07:22:25,499 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-06 07:22:25,520 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-06 07:22:25,521 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-06 07:22:25,523 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-06 07:22:25,524 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-06 07:22:25,526 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-06 07:22:25,527 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-06 07:22:25,529 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-06 07:22:25,534 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-06 07:22:25,535 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-06 07:22:25,538 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-06 07:22:25,538 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-06 07:22:25,540 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-06 07:22:25,546 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-06 07:22:25,553 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-06 07:22:25,554 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-06 07:22:25,554 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-06 07:22:25,558 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2021-05-06 07:22:25,574 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-06 07:22:25,574 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-06 07:22:25,577 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-06 07:22:25,577 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-06 07:22:25,577 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-06 07:22:25,578 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-06 07:22:25,578 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-06 07:22:25,578 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-06 07:22:25,578 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-06 07:22:25,578 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-06 07:22:25,579 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-06 07:22:25,579 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-06 07:22:25,579 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-06 07:22:25,579 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-06 07:22:25,580 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-06 07:22:25,580 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-06 07:22:25,580 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-06 07:22:25,580 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-06 07:22:25,580 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 07:22:25,580 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-06 07:22:25,581 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-06 07:22:25,582 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-05-06 07:22:25,582 INFO L138 SettingsManager]: * TransformationType=LOOP_ACCELERATION_JORDAN WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-06 07:22:25,930 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-06 07:22:25,956 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-06 07:22:25,958 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-06 07:22:25,960 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-06 07:22:25,960 INFO L275 PluginConnector]: CDTParser initialized [2021-05-06 07:22:25,961 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/cohendiv-ll_unwindbound1.c [2021-05-06 07:22:26,022 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/573ad45d3/a6841f5ea7a24030ae06c04f99a01e29/FLAG9afefe5c3 [2021-05-06 07:22:26,399 INFO L306 CDTParser]: Found 1 translation units. [2021-05-06 07:22:26,399 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/cohendiv-ll_unwindbound1.c [2021-05-06 07:22:26,406 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/573ad45d3/a6841f5ea7a24030ae06c04f99a01e29/FLAG9afefe5c3 [2021-05-06 07:22:26,423 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/573ad45d3/a6841f5ea7a24030ae06c04f99a01e29 [2021-05-06 07:22:26,425 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-06 07:22:26,427 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-05-06 07:22:26,432 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-06 07:22:26,432 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-06 07:22:26,435 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-06 07:22:26,436 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 07:22:26" (1/1) ... [2021-05-06 07:22:26,437 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@33a36d3b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:22:26, skipping insertion in model container [2021-05-06 07:22:26,437 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 07:22:26" (1/1) ... [2021-05-06 07:22:26,442 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-06 07:22:26,455 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-06 07:22:26,600 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/cohendiv-ll_unwindbound1.c[576,589] [2021-05-06 07:22:26,619 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 07:22:26,627 INFO L203 MainTranslator]: Completed pre-run [2021-05-06 07:22:26,638 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/cohendiv-ll_unwindbound1.c[576,589] [2021-05-06 07:22:26,655 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 07:22:26,680 INFO L208 MainTranslator]: Completed translation [2021-05-06 07:22:26,681 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:22:26 WrapperNode [2021-05-06 07:22:26,681 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-06 07:22:26,683 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-06 07:22:26,683 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-06 07:22:26,683 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-06 07:22:26,699 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:22:26" (1/1) ... [2021-05-06 07:22:26,699 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:22:26" (1/1) ... [2021-05-06 07:22:26,706 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:22:26" (1/1) ... [2021-05-06 07:22:26,706 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:22:26" (1/1) ... [2021-05-06 07:22:26,720 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:22:26" (1/1) ... [2021-05-06 07:22:26,726 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:22:26" (1/1) ... [2021-05-06 07:22:26,731 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:22:26" (1/1) ... [2021-05-06 07:22:26,735 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-06 07:22:26,736 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-06 07:22:26,737 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-06 07:22:26,737 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-06 07:22:26,737 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:22:26" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 07:22:26,811 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-06 07:22:26,811 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-06 07:22:26,811 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-06 07:22:26,812 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-06 07:22:26,812 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-06 07:22:26,812 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-06 07:22:26,812 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-06 07:22:26,813 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-06 07:22:26,813 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-06 07:22:26,813 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-06 07:22:26,813 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-06 07:22:26,813 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-06 07:22:26,813 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-06 07:22:26,814 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-06 07:22:26,814 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-06 07:22:26,814 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-06 07:22:26,814 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-06 07:22:26,814 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-06 07:22:26,815 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-06 07:22:26,815 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-06 07:22:27,164 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-06 07:22:27,164 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-05-06 07:22:27,165 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 07:22:27 BoogieIcfgContainer [2021-05-06 07:22:27,165 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-06 07:22:27,167 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2021-05-06 07:22:27,167 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2021-05-06 07:22:27,168 INFO L275 PluginConnector]: IcfgTransformer initialized [2021-05-06 07:22:27,170 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 07:22:27" (1/1) ... [2021-05-06 07:22:27,183 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.05 07:22:27 BasicIcfg [2021-05-06 07:22:27,183 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2021-05-06 07:22:27,185 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-06 07:22:27,185 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-06 07:22:27,188 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-06 07:22:27,188 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.05 07:22:26" (1/4) ... [2021-05-06 07:22:27,189 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6cffadf7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 07:22:27, skipping insertion in model container [2021-05-06 07:22:27,189 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:22:26" (2/4) ... [2021-05-06 07:22:27,190 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6cffadf7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 07:22:27, skipping insertion in model container [2021-05-06 07:22:27,190 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 07:22:27" (3/4) ... [2021-05-06 07:22:27,192 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6cffadf7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.05 07:22:27, skipping insertion in model container [2021-05-06 07:22:27,193 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.05 07:22:27" (4/4) ... [2021-05-06 07:22:27,197 INFO L111 eAbstractionObserver]: Analyzing ICFG cohendiv-ll_unwindbound1.cJordan [2021-05-06 07:22:27,201 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2021-05-06 07:22:27,203 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-06 07:22:27,217 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-06 07:22:27,233 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-06 07:22:27,233 INFO L377 AbstractCegarLoop]: Hoare is false [2021-05-06 07:22:27,234 INFO L378 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2021-05-06 07:22:27,234 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-06 07:22:27,234 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-06 07:22:27,234 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-06 07:22:27,234 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-06 07:22:27,234 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-06 07:22:27,245 INFO L276 IsEmpty]: Start isEmpty. Operand has 38 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 23 states have internal predecessors, (31), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-05-06 07:22:27,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-06 07:22:27,251 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 07:22:27,252 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 07:22:27,252 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 07:22:27,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 07:22:27,256 INFO L82 PathProgramCache]: Analyzing trace with hash 1213541379, now seen corresponding path program 1 times [2021-05-06 07:22:27,263 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 07:22:27,264 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1760930060] [2021-05-06 07:22:27,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 07:22:27,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 07:22:27,492 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 07:22:27,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 07:22:27,527 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-06 07:22:27,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 07:22:27,535 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 07:22:27,536 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 07:22:27,536 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1760930060] [2021-05-06 07:22:27,537 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1760930060] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 07:22:27,538 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 07:22:27,538 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-06 07:22:27,539 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [325471509] [2021-05-06 07:22:27,542 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-06 07:22:27,543 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 07:22:27,553 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-06 07:22:27,554 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 07:22:27,557 INFO L87 Difference]: Start difference. First operand has 38 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 23 states have internal predecessors, (31), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-06 07:22:27,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 07:22:27,720 INFO L93 Difference]: Finished difference Result 39 states and 48 transitions. [2021-05-06 07:22:27,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-06 07:22:27,722 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2021-05-06 07:22:27,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 07:22:27,727 INFO L225 Difference]: With dead ends: 39 [2021-05-06 07:22:27,728 INFO L226 Difference]: Without dead ends: 34 [2021-05-06 07:22:27,729 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 51.7ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 07:22:27,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-05-06 07:22:27,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2021-05-06 07:22:27,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 19 states have (on average 1.263157894736842) internal successors, (24), 20 states have internal predecessors, (24), 10 states have call successors, (10), 4 states have call predecessors, (10), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-06 07:22:27,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 42 transitions. [2021-05-06 07:22:27,766 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 42 transitions. Word has length 17 [2021-05-06 07:22:27,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 07:22:27,767 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 42 transitions. [2021-05-06 07:22:27,767 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-06 07:22:27,767 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 42 transitions. [2021-05-06 07:22:27,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-06 07:22:27,767 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 07:22:27,768 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 07:22:27,768 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-06 07:22:27,768 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 07:22:27,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 07:22:27,769 INFO L82 PathProgramCache]: Analyzing trace with hash -1202035559, now seen corresponding path program 1 times [2021-05-06 07:22:27,769 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 07:22:27,769 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [886469129] [2021-05-06 07:22:27,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 07:22:27,811 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 07:22:27,812 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [925528641] [2021-05-06 07:22:27,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 07:22:27,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 07:22:27,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-06 07:22:27,883 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 07:22:27,916 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:22:27,921 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:22:27,922 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:22:27,956 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:22:27,966 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:22:27,995 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 07:22:27,996 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 07:22:27,996 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [886469129] [2021-05-06 07:22:27,996 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 07:22:27,996 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [925528641] [2021-05-06 07:22:27,996 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [925528641] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 07:22:27,996 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 07:22:27,996 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-06 07:22:27,997 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1985281321] [2021-05-06 07:22:27,998 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-06 07:22:27,998 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 07:22:27,998 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-06 07:22:27,998 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-06 07:22:27,999 INFO L87 Difference]: Start difference. First operand 33 states and 42 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-06 07:22:28,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 07:22:28,022 INFO L93 Difference]: Finished difference Result 35 states and 44 transitions. [2021-05-06 07:22:28,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-06 07:22:28,022 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 18 [2021-05-06 07:22:28,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 07:22:28,023 INFO L225 Difference]: With dead ends: 35 [2021-05-06 07:22:28,023 INFO L226 Difference]: Without dead ends: 35 [2021-05-06 07:22:28,024 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.9ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-06 07:22:28,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-05-06 07:22:28,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2021-05-06 07:22:28,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 21 states have (on average 1.2380952380952381) internal successors, (26), 22 states have internal predecessors, (26), 10 states have call successors, (10), 4 states have call predecessors, (10), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-06 07:22:28,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 44 transitions. [2021-05-06 07:22:28,030 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 44 transitions. Word has length 18 [2021-05-06 07:22:28,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 07:22:28,030 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 44 transitions. [2021-05-06 07:22:28,030 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-06 07:22:28,030 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 44 transitions. [2021-05-06 07:22:28,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-06 07:22:28,031 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 07:22:28,031 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 07:22:28,241 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-06 07:22:28,241 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 07:22:28,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 07:22:28,242 INFO L82 PathProgramCache]: Analyzing trace with hash -1200933292, now seen corresponding path program 1 times [2021-05-06 07:22:28,242 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 07:22:28,242 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [872452807] [2021-05-06 07:22:28,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 07:22:28,253 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 07:22:28,254 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1342856167] [2021-05-06 07:22:28,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 07:22:28,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 07:22:28,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-06 07:22:28,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 07:22:28,382 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:22:28,385 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:22:28,397 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:22:28,411 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 07:22:28,411 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 07:22:28,412 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [872452807] [2021-05-06 07:22:28,412 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 07:22:28,412 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1342856167] [2021-05-06 07:22:28,412 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1342856167] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 07:22:28,412 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 07:22:28,412 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-06 07:22:28,413 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474339847] [2021-05-06 07:22:28,413 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 07:22:28,413 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 07:22:28,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 07:22:28,414 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-06 07:22:28,414 INFO L87 Difference]: Start difference. First operand 35 states and 44 transitions. Second operand has 8 states, 8 states have (on average 1.5) internal successors, (12), 6 states have internal predecessors, (12), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-06 07:22:28,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 07:22:28,524 INFO L93 Difference]: Finished difference Result 43 states and 54 transitions. [2021-05-06 07:22:28,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 07:22:28,525 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.5) internal successors, (12), 6 states have internal predecessors, (12), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 18 [2021-05-06 07:22:28,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 07:22:28,526 INFO L225 Difference]: With dead ends: 43 [2021-05-06 07:22:28,526 INFO L226 Difference]: Without dead ends: 43 [2021-05-06 07:22:28,526 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 52.8ms TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-05-06 07:22:28,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-05-06 07:22:28,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 40. [2021-05-06 07:22:28,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 24 states have (on average 1.2083333333333333) internal successors, (29), 26 states have internal predecessors, (29), 11 states have call successors, (11), 5 states have call predecessors, (11), 4 states have return successors, (9), 8 states have call predecessors, (9), 9 states have call successors, (9) [2021-05-06 07:22:28,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 49 transitions. [2021-05-06 07:22:28,534 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 49 transitions. Word has length 18 [2021-05-06 07:22:28,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 07:22:28,534 INFO L480 AbstractCegarLoop]: Abstraction has 40 states and 49 transitions. [2021-05-06 07:22:28,534 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 1.5) internal successors, (12), 6 states have internal predecessors, (12), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-06 07:22:28,534 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 49 transitions. [2021-05-06 07:22:28,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-06 07:22:28,535 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 07:22:28,535 INFO L523 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 07:22:28,744 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 07:22:28,747 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 07:22:28,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 07:22:28,747 INFO L82 PathProgramCache]: Analyzing trace with hash -944097291, now seen corresponding path program 1 times [2021-05-06 07:22:28,748 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 07:22:28,748 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1180312016] [2021-05-06 07:22:28,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 07:22:28,759 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 07:22:28,759 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [307933618] [2021-05-06 07:22:28,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 07:22:28,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 07:22:28,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-06 07:22:28,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 07:22:28,914 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:22:28,916 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:22:28,939 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:22:28,942 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:22:28,953 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:22:28,968 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 07:22:28,968 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 07:22:28,968 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1180312016] [2021-05-06 07:22:28,969 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 07:22:28,969 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [307933618] [2021-05-06 07:22:28,969 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [307933618] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 07:22:28,969 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 07:22:28,969 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-06 07:22:28,969 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925920479] [2021-05-06 07:22:28,970 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 07:22:28,970 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 07:22:28,970 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 07:22:28,970 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-06 07:22:28,971 INFO L87 Difference]: Start difference. First operand 40 states and 49 transitions. Second operand has 8 states, 8 states have (on average 1.875) internal successors, (15), 6 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 07:22:29,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 07:22:29,085 INFO L93 Difference]: Finished difference Result 56 states and 72 transitions. [2021-05-06 07:22:29,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 07:22:29,086 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.875) internal successors, (15), 6 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 23 [2021-05-06 07:22:29,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 07:22:29,089 INFO L225 Difference]: With dead ends: 56 [2021-05-06 07:22:29,089 INFO L226 Difference]: Without dead ends: 55 [2021-05-06 07:22:29,090 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 47.9ms TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-05-06 07:22:29,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-05-06 07:22:29,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 54. [2021-05-06 07:22:29,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 32 states have (on average 1.21875) internal successors, (39), 33 states have internal predecessors, (39), 16 states have call successors, (16), 6 states have call predecessors, (16), 5 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2021-05-06 07:22:29,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 69 transitions. [2021-05-06 07:22:29,110 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 69 transitions. Word has length 23 [2021-05-06 07:22:29,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 07:22:29,110 INFO L480 AbstractCegarLoop]: Abstraction has 54 states and 69 transitions. [2021-05-06 07:22:29,111 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 1.875) internal successors, (15), 6 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 07:22:29,111 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 69 transitions. [2021-05-06 07:22:29,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-05-06 07:22:29,112 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 07:22:29,112 INFO L523 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 07:22:29,336 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 07:22:29,336 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 07:22:29,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 07:22:29,337 INFO L82 PathProgramCache]: Analyzing trace with hash -653220550, now seen corresponding path program 1 times [2021-05-06 07:22:29,337 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 07:22:29,337 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1937733779] [2021-05-06 07:22:29,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 07:22:29,345 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 07:22:29,345 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1832028379] [2021-05-06 07:22:29,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 07:22:29,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 07:22:29,420 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-06 07:22:29,422 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 07:22:29,444 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:22:29,451 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:22:29,452 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:22:29,485 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:22:29,491 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:22:29,493 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:22:29,520 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:22:29,522 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:22:29,533 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 07:22:29,534 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 07:22:29,534 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1937733779] [2021-05-06 07:22:29,534 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 07:22:29,534 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1832028379] [2021-05-06 07:22:29,534 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1832028379] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 07:22:29,534 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 07:22:29,534 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 07:22:29,534 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978542097] [2021-05-06 07:22:29,535 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 07:22:29,535 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 07:22:29,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 07:22:29,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-06 07:22:29,535 INFO L87 Difference]: Start difference. First operand 54 states and 69 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-06 07:22:29,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 07:22:29,563 INFO L93 Difference]: Finished difference Result 42 states and 45 transitions. [2021-05-06 07:22:29,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-06 07:22:29,563 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) Word has length 31 [2021-05-06 07:22:29,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 07:22:29,564 INFO L225 Difference]: With dead ends: 42 [2021-05-06 07:22:29,564 INFO L226 Difference]: Without dead ends: 42 [2021-05-06 07:22:29,564 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 13.2ms TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-05-06 07:22:29,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-05-06 07:22:29,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 40. [2021-05-06 07:22:29,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 26 states have (on average 1.1153846153846154) internal successors, (29), 27 states have internal predecessors, (29), 8 states have call successors, (8), 6 states have call predecessors, (8), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-06 07:22:29,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 43 transitions. [2021-05-06 07:22:29,568 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 43 transitions. Word has length 31 [2021-05-06 07:22:29,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 07:22:29,568 INFO L480 AbstractCegarLoop]: Abstraction has 40 states and 43 transitions. [2021-05-06 07:22:29,568 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-06 07:22:29,568 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 43 transitions. [2021-05-06 07:22:29,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-05-06 07:22:29,569 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 07:22:29,569 INFO L523 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 07:22:29,792 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 07:22:29,792 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 07:22:29,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 07:22:29,793 INFO L82 PathProgramCache]: Analyzing trace with hash -830156892, now seen corresponding path program 1 times [2021-05-06 07:22:29,793 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 07:22:29,793 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1695845710] [2021-05-06 07:22:29,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 07:22:29,803 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 07:22:29,803 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [455289147] [2021-05-06 07:22:29,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 07:22:29,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 07:22:29,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-06 07:22:29,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 07:22:30,011 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:22:30,023 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 07:22:30,023 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 07:22:30,023 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1695845710] [2021-05-06 07:22:30,023 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 07:22:30,024 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [455289147] [2021-05-06 07:22:30,024 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [455289147] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 07:22:30,024 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 07:22:30,024 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-06 07:22:30,024 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1540158503] [2021-05-06 07:22:30,025 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-06 07:22:30,025 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 07:22:30,026 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-06 07:22:30,026 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-05-06 07:22:30,028 INFO L87 Difference]: Start difference. First operand 40 states and 43 transitions. Second operand has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-06 07:22:30,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 07:22:30,096 INFO L93 Difference]: Finished difference Result 56 states and 62 transitions. [2021-05-06 07:22:30,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-06 07:22:30,097 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 34 [2021-05-06 07:22:30,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 07:22:30,098 INFO L225 Difference]: With dead ends: 56 [2021-05-06 07:22:30,098 INFO L226 Difference]: Without dead ends: 55 [2021-05-06 07:22:30,100 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 40.1ms TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-05-06 07:22:30,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-05-06 07:22:30,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 52. [2021-05-06 07:22:30,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 35 states have (on average 1.0857142857142856) internal successors, (38), 36 states have internal predecessors, (38), 10 states have call successors, (10), 7 states have call predecessors, (10), 6 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-06 07:22:30,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 56 transitions. [2021-05-06 07:22:30,113 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 56 transitions. Word has length 34 [2021-05-06 07:22:30,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 07:22:30,114 INFO L480 AbstractCegarLoop]: Abstraction has 52 states and 56 transitions. [2021-05-06 07:22:30,114 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-06 07:22:30,114 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 56 transitions. [2021-05-06 07:22:30,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-05-06 07:22:30,114 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 07:22:30,115 INFO L523 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 07:22:30,337 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-05-06 07:22:30,337 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 07:22:30,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 07:22:30,337 INFO L82 PathProgramCache]: Analyzing trace with hash -829054625, now seen corresponding path program 1 times [2021-05-06 07:22:30,338 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 07:22:30,338 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1152846514] [2021-05-06 07:22:30,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 07:22:30,348 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 07:22:30,348 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [106376183] [2021-05-06 07:22:30,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 07:22:30,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 07:22:30,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 4 conjunts are in the unsatisfiable core [2021-05-06 07:22:30,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 07:22:30,487 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:22:30,490 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:22:30,496 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:22:30,498 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:22:30,513 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 07:22:30,514 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 07:22:30,514 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1152846514] [2021-05-06 07:22:30,514 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 07:22:30,514 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [106376183] [2021-05-06 07:22:30,514 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [106376183] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 07:22:30,514 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 07:22:30,514 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 07:22:30,514 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [55599125] [2021-05-06 07:22:30,515 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 07:22:30,515 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 07:22:30,515 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 07:22:30,515 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-06 07:22:30,516 INFO L87 Difference]: Start difference. First operand 52 states and 56 transitions. Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-05-06 07:22:30,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 07:22:30,533 INFO L93 Difference]: Finished difference Result 30 states and 29 transitions. [2021-05-06 07:22:30,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-06 07:22:30,533 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 34 [2021-05-06 07:22:30,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 07:22:30,534 INFO L225 Difference]: With dead ends: 30 [2021-05-06 07:22:30,534 INFO L226 Difference]: Without dead ends: 0 [2021-05-06 07:22:30,534 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 13.1ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-06 07:22:30,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-05-06 07:22:30,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-05-06 07:22:30,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-06 07:22:30,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-05-06 07:22:30,535 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 34 [2021-05-06 07:22:30,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 07:22:30,535 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-05-06 07:22:30,535 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-05-06 07:22:30,535 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-05-06 07:22:30,535 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-05-06 07:22:30,748 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 07:22:30,752 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.05 07:22:30 BasicIcfg [2021-05-06 07:22:30,752 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-06 07:22:30,753 INFO L168 Benchmark]: Toolchain (without parser) took 4325.95 ms. Allocated memory is still 192.9 MB. Free memory was 157.1 MB in the beginning and 127.3 MB in the end (delta: 29.8 MB). Peak memory consumption was 30.7 MB. Max. memory is 8.0 GB. [2021-05-06 07:22:30,753 INFO L168 Benchmark]: CDTParser took 0.14 ms. Allocated memory is still 192.9 MB. Free memory is still 173.7 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-06 07:22:30,753 INFO L168 Benchmark]: CACSL2BoogieTranslator took 249.64 ms. Allocated memory is still 192.9 MB. Free memory was 156.9 MB in the beginning and 176.6 MB in the end (delta: -19.8 MB). Peak memory consumption was 14.3 MB. Max. memory is 8.0 GB. [2021-05-06 07:22:30,753 INFO L168 Benchmark]: Boogie Preprocessor took 51.77 ms. Allocated memory is still 192.9 MB. Free memory was 176.1 MB in the beginning and 174.5 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-05-06 07:22:30,753 INFO L168 Benchmark]: RCFGBuilder took 429.35 ms. Allocated memory is still 192.9 MB. Free memory was 174.5 MB in the beginning and 157.8 MB in the end (delta: 16.8 MB). Peak memory consumption was 16.8 MB. Max. memory is 8.0 GB. [2021-05-06 07:22:30,754 INFO L168 Benchmark]: IcfgTransformer took 16.66 ms. Allocated memory is still 192.9 MB. Free memory was 157.8 MB in the beginning and 156.2 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-05-06 07:22:30,754 INFO L168 Benchmark]: TraceAbstraction took 3567.50 ms. Allocated memory is still 192.9 MB. Free memory was 155.7 MB in the beginning and 127.3 MB in the end (delta: 28.4 MB). Peak memory consumption was 30.0 MB. Max. memory is 8.0 GB. [2021-05-06 07:22:30,754 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14 ms. Allocated memory is still 192.9 MB. Free memory is still 173.7 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 249.64 ms. Allocated memory is still 192.9 MB. Free memory was 156.9 MB in the beginning and 176.6 MB in the end (delta: -19.8 MB). Peak memory consumption was 14.3 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 51.77 ms. Allocated memory is still 192.9 MB. Free memory was 176.1 MB in the beginning and 174.5 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 429.35 ms. Allocated memory is still 192.9 MB. Free memory was 174.5 MB in the beginning and 157.8 MB in the end (delta: 16.8 MB). Peak memory consumption was 16.8 MB. Max. memory is 8.0 GB. * IcfgTransformer took 16.66 ms. Allocated memory is still 192.9 MB. Free memory was 157.8 MB in the beginning and 156.2 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * TraceAbstraction took 3567.50 ms. Allocated memory is still 192.9 MB. Free memory was 155.7 MB in the beginning and 127.3 MB in the end (delta: 28.4 MB). Peak memory consumption was 30.0 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 17]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 38 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 3518.1ms, OverallIterations: 7, TraceHistogramMax: 3, EmptinessCheckTime: 14.3ms, AutomataDifference: 565.6ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 7.3ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 248 SDtfs, 95 SDslu, 634 SDs, 0 SdLazy, 252 SolverSat, 29 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 319.8ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 166 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 228.1ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=54occurred in iteration=4, InterpolantAutomatonStates: 40, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 75.6ms AutomataMinimizationTime, 7 MinimizatonAttempts, 10 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 77.9ms SsaConstructionTime, 184.2ms SatisfiabilityAnalysisTime, 840.7ms InterpolantComputationTime, 175 NumberOfCodeBlocks, 175 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 168 ConstructedInterpolants, 0 QuantifiedInterpolants, 470 SizeOfPredicates, 10 NumberOfNonLiveVariables, 831 ConjunctsInSsa, 55 ConjunctsInUnsatCore, 7 InterpolantComputations, 6 PerfectInterpolantSequences, 29/31 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! Received shutdown request...